identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03AF61160E28FF9CFF45FDB5FBE9FAF0.text	03AF61160E28FF9CFF45FDB5FBE9FAF0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa obliquata (Suffrian 1863) F. Monros	<div><p>Mylassa obliquata (Suffrian, 1863)</p><p>(Fig. 3; Figs. 12c; 15g –i; 20a–b; 24a–b; 26c)</p><p>Cryptocephalus obliquatus Suffrian, 1863: 175 (original description); Clavareau, 1913: 167 (catalogue).</p><p>Mylassa obliquata Jacobson, 1924: 257 (catalogue); Monrós, 1949: 516 (redescription); Agrain et al. 2017: 61 (catalogue).</p><p>Mylassa chachallaoi Monrós, 1949: 513 (original description); Roig-Juñent, 2004: 107 (catalogue); Agrain et al. 2017: 60 (catalogue). Syn. nov.</p><p>Types. Suffrian (1863) did not mention the number of the studied specimens but reported that he saw male(s) from Valdivia in coll. Sturm, and females from coll. Riehl, Deyrolle e Haag. This material was sought in public collections currently housing parts of the aforementioned collections (ZSM, BMNH, SDEI, MLUH and PZCM). Two specimens, females, to be considered part of the original type series studied by Suffrian, were located at BMNH and SDEI. The former of these (BMNH) appears severely damaged and incomplete, lacking the features necessary for confident identification, while the latter (SDEI) is female. Additionally, four specimens, one male and three females, are housed at MLUH in the Suffrian collection. In this case, as is customary in Suffrian’s collection, specimens lack labels indicating their provenance. However, it is more than reasonable to assume that all material in his personal collection, unless there are clear contrary indications, consists of retained specimens from the original series used for his research. Moreover, these specimens undoubtedly correspond to Suffrian’s concept of the species he described. For this reason, the specimens at MLUH have been considered syntypes. Since the only available male is among them, it has been designated as the lectotype. It should be noted that I. S. Askevold also selected and labelled this specimen as lectotype in 1988, but the nomenclatural act was never published. Type designation was made as follows, in order to stabilize the epithet. LECTOTYPE (by present designation): (MLUH), ♂, pinned // “obliquatus m. Chile ” [White label, handwritten. The label is not attached to the individual specimen but placed at the beginning of the specimens’ row] // “19003” [White label, handwritten] // “ Lectotype ♂ Cryptocephalus obliquatus Suffrian design. I. S. Askevold 1988” [Red label, partly handwritten] // “ Mylassa crassicollis (Blanch.) det. I. S. Askevold 1988” [White label, partly handwritten] // “ Mylassa obliquata (Suffrian, 1863) ( Cryptocephalus obliquatus) LECTOTYPUS D. Sassi des.” [red label, printed]. PARALECTOTYPES (5): (MLUH), ♀, pinned // “26644” [White label, handwritten] // “ Mylassa crassicollis (Blanch.) det. I. S. Askevold 1988” [White label, partly handwritten]; (MLUH), ♀, pinned // “23924” [White label, handwritten] // “ Mylassa crassicollis (Blanch.) det. I. S. Askevold 1988” [White label, partly handwritten]; (MLUH), ♀, pinned // “94729” [White label, handwritten] // “ Mylassa crassicollis (Blanch.) det. I. S. Askevold 1988” [White label, partly handwritten]; (BMNH), ♀, pinned // “ Chili ” [green label, handwritten] // “Type Suffr coll. Deyrolle” [white label, handwritten] // “Baly Coll.” [white label, printed] // “ Mylassa obliquata Suffr Chili ” [white label, handwritten]; (SDEI), ♀, glued // “ Chili Riehl” [white label, handwritten] // “Coll. Haag” [white label, printed] // “obliquatus Suffr. ” [white label, handwritten] // “SDEI Coleoptera # 303853” [white label, printed]. All paralectotypes were labelled: // “ Mylassa obliquata (Suffrian, 1863) ( Cryptocephalus obliquatus) PARALECTOTYPUS D. Sassi des.” [red label, printed] //.</p><p>Monrós (1949) described M. chachallaoi based on 21 specimens available for his study, some of which, including the holotype, kept in his personal collection, which is now housed at USNMNH, and others in IFML. Again, thanks to the courtesy of Alexander Konstantinov (USNMNH) it has been possible to confirm presence of holotype in USNMNH. It is labelled as follows: HOLOTYPE: (USNMNH)), ♂, glued, aedeagal median lobe and abdomen glued on a separate card // “ Chile Frutillar Feb. 944 Kuschel” [White label, handwritten] // “Sobre Lomantia [sic] obliqua Kuschel.” [White label, handwritten] // “ Mylassa chachallaoi mihi F. Monrós det. 1949” [Pink label, partly handwritten] // “TypeNo.65279 U.S. N.M.” [Red label, partly handwritten] // “? Holotype OH,3” [White label, handwritten] // “USNMENT 00911231” [White label, printed] // “ Mylassa chachallaoi Monrós, 1949 HOLOTYPUS D. Sassi vidit.” [red label, printed] // “ Mylassa obliquata Suffrian, 1863 D. Sassi det. 2025 [White label, printed] //. In addition, thanks to the courtesy of Emilia Constanza Perez (IFML) and, again, Alexander Konstantinov (USNMNH) it was possible to confirm presence of 4 paratypes in IFML and 4 paratypes in USNMNH. I had the chance to examine numerous specimens, including some paratypes from material studied by Monrós. From my analysis, it becomes evident that Monrós, without having studied types of M. obliquata, had formed an inaccurate understanding of this species. He erroneously assigned specimens belonging to an unpublished taxon, which is described herein as M. monrosi, to M. obliquata, and subsequently redescribed the latter as a new species, naming it as M. chachallaoi . Indeed, the two species share obvious similarities, and lack of examination of type material can result in misinterpretation. It is noteworthy, however, that Suffrian aptly described a potentially decisive character: distinct conformation of apex of anterior tibiae in males of M. obliquata (“die langen Vorderschienen mit dem unteren Viertel stark einwärts gekrümmt, vor den Enden rhombisch verbreitert und dann noch seitlich in eine spornartige Spitze ausgezogen”). It is surprising that Monrós overlooked this detail. Based on previous considerations, the following new synonymy is proposed here: Mylassa obliquata (Suffrian, 1866) = Mylassa chachallaoi Monrós, 1949 syn. nov.</p><p>Type locality. M. obliquata: Valdivia (Los Rios, Chile). M. chachallaoi: Frutillar (Los Lagos, Chile).</p><p>Additional material examined. (36 specimens). ARGENTINA: Chubut: Parque Nacional los Alerces Río Arrayanes 9.III.1974 (3, MDPC) . CHILE: Araucanía: Curacautín env. 21.I.2005 (3, MSNG) ; Malleco Prov. Parc Nac. Nahuelbuta 1100m 5–8.I.1989 (1, IAPC) . Los Lagos: Petrohué 27.XII.1943 (1, USNMNH) ; Petrohué 25.II.1972 (3, DSPC) ; W of Los Muermos 160m 28.I.2005 (2, MSNG) ; Entre Lagos W of Anticura 12.II.2005 (2, MSNG) . Los Ríos: Niebla Valdivia (1, DSPC) ; Valdivia (1, DSPC) ; E of Lago Ranco 2.II.2004 (6, MSNG) ; NW of La Unión Santa Elisa env. 24.I.2004 (2, MSNG) ; W of La Unión E of El Mirador 27.I.2004 (8, MSNG) . Maule: Bullileo Parral I.1979 (1, IAPC) . “ Chili ” (2, NMPC) .</p><p>Additional data from literature and GBIF. (as M. chachallaoi): ARGENTINA: Chubut: Lake Futalafquen (Monrós, 1949). Neuquén: PuertoAnchorena Isla Victoria (Monrós, 1949);Puerto Radal Isla Victoria(Monrós, 1949). CHILE: Los Lagos: Petrohué (Monrós, 1949); Llanquihue (https://www.inaturalist.org/observations/258076567).</p><p>Distribution. Argentina (Chubut, Neuquén); Chile (Araucanía, Los Lagos, Los Ríos, Maule).</p><p>Biological notes. The species was collected by Monrós (1949) on Lomatia hirsuta subsp. obliqua (Ruiz &amp; Pav.) R. T. Penn. ( Proteaceae).</p><p>Diagnosis. The species is morphologically similar to the quite variable Mylassa crassicollis . As Monrós (1949) already pointed out, the red patch covering the entire base of the elytron and extending backward along the lateral margin seems to be rather typical of the species, at least in males. Even when this red chromatic pattern appears scarcely recognizable, it still tends to develop along the margins of the elytron; hence, the course of the red elytral design remains rather distinct from that of M. crassicollis, typically more transverse and zigzagging. Additionally, dimensions in M. obliquata are slightly larger, and the tooth-like process at the distal ending of the anterior tibiae is noticeably sturdier. In the median lobe of the aedeagus, the apex is more pointed with a thinner edge, and the longitudinal median ridge on the ventral surface is less pronounced. The setigerous lamellae are almost squareshaped and therefore substantially symmetrical along the apical edge. In some specimens, usually females, exhibiting reduced red elytral coloration, the chromatic pattern is practically identical to that of M. monrosi . In this instance, however, the denser and more robust punctation of the pronotum, which is slightly less bulging, and the shorter antennomeres in the latter species allows for effective discrimination.</p><p>Description of male. Habitus in Figs. 3a–b, 3m. BL = 3.8–4.2 mm, BW = 2.4–2.5 mm, PL = 1.4–1.8 mm, PW = 2.2–2.4 mm. Interocular distance 14.3–15.8 % of BL.</p><p>Head totally black. Labrum dark brownish. Vertex and frontoclypeal surface covered with recumbent setae and minute punctation, sparser on clypeal area. Mid-cranial suture not clearly detectable. Eyes small, scarcely bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines shallow, visible along upper lobe, adhering to ocular rim. Antennae long, almost reaching elytral apex when bent backwards, antennomeres slender, dark brown (2–3 slightly lighter), bright, scarcely setose; antennomeres 4–10 subcylindrical, scarcely different in shape; length nearly uniform.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, weakly and regularly arched with maximum width at hind angles. Posterolateral impressions short and shallow, close to posterior margin. Pronotal surface covered with close, regularly distributed fine punctation and sparse, appressed whitish setae. Posterior lobe wide, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, not raised, very minutely punctured, surface covered with short, appressed setae.</p><p>Elytron black with transverse band covering basal margin up to humeral callus, extended backward parallel to lateral margin up to midline. Such band sometimes medially reaching anterior end of suture.Apex of elytron covered with red spot as well. Usually, a further small lengthened red spot at middle of disc. Elytral outline cylindrical, slightly flattened behind scutellum, with sides almost parallel or slightly convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytral punctures arranged in almost regular rows, well impressed, distinguishable also towards apex. All elytral surface covered with appressed or semi-erect setae, partly whitish, partly blackish. Epipleura narrow, with concave, rugulose surface.</p><p>Pygidium black, covered by fine punctures and rather thick whitish setae.</p><p>Ventral surface black, matt, covered with long appressed whitish setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, transverse, transversely depressed behind midline and raised at sides; sides with long, sharp denticle at middle; surface minutely punctured, covered with thick erect setae; posterior margin almost straight.</p><p>Legs totally black. Anterior tibiae bent inwards before apex, with strong spur-like process on inner end. Apex of median tibiae enlarged, with robust blunt, subapical tooth-like process on inner side.</p><p>Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 15g –i) stubby, weakly pointed at apex. Aedeagal ventral surface strongly concave, with only hint of longitudinal carina. Setose depressions slender, shallow, scarcely delimited. Setigerous lamellae large, triangular, bearing long, thick setae.</p><p>Female. BL = 4.4–4.6 mm, BW = 2.8–2.9 mm, PL = 1.8–1.9 mm, PW = 2.7 mm. Interocular distance 17.4–18.2 % of BL.</p><p>Female differs in lacking fore and median tibial modifications, in slenderer and shorter fore tarsi, in the shorter antennae, in shape of pronotal posterior lobe, which is proportionally wider.</p><p>Fifth abdominal ventrite in female with large, shallow, anteriorly tapered pit with a flat, scarcely setose base.</p><p>The vasculum of spermatheca (Figs. 24a–b) is scarcely pigmented, slender, hook-shaped, with proximal and distal lobes particularly slender, approximately of same length. Ampulla lengthened, cylindrical and weakly pigmented. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of the ampulla. Duct is short, coiled along its distal section. The rigid and opaque sleeve surrounding proximal section is curved at insertion on the bursa copulatrix.</p><p>Remarks. For this species, as for others housed in London, Berlin, and Washington, I. S. Askevold made interesting observations and left handwritten notes on labels attached to specimens in the years 1988 and 1998. Unfortunately, he never published the results of his research, but his notes provided useful insights in formulating some of my taxonomic evaluations. In the case of species in question, Askevold correctly assessed appropriateness of considering the male preserved in Halle as the name-bearing type; however, it should be noted that at that time (1988), he considered Mylassa obliquata a junior subjective synonym of M. crassicollis . He later changed his opinion (1998), coming to regard M. obliquata as a distinct species from M. crassicollis but considering that this name should be considered a junior synonym of Pachybrachis concinnus Philippi, 1859 . The observation is certainly interesting, and it is indeed very likely that P. concinnus is actually a Mylassa . However, the description of P. concinnus appears too vague and ambiguous, and it might apply to most of the species belonging to the genus Mylassa, including some described as new in this work. Unfortunately, despite thorough research, it was not possible to locate type material of P. concinnus in either European or South American institutions, and it is likely that this material should be considered lost. Therefore, at least with the current state of knowledge, it does not seem possible to use this name in the present work.</p><p>Mylassa pectinicornis (Suffrian, 1866)</p><p>(Fig. 4; Figs. 12d; 16a–c; 20c–d; 24c–d; 26d)</p><p>Cryptocephalus pectinicornis Suffrian, 1866: 16 (original description); Clavareau, 1913: 172 (catalogue); Blackwelder, 1946: 646 (catalogue).</p><p>Mylassa pectinicornis Jacobson, 1924: 257 (catalogue); Monrós, 1949: 520 (redescription); Roig-Juñent, 2004: 107 (catalogue); Schöller, 2008: 96 (taxonomic notes); Agrain et al. 2017: 61 (catalogue).</p><p>Types. Suffrian (1866) clearly states a single male was available for description, and it came from the Clark collection. The possible type must therefore be in London (where the Clark collection is housed) and possibly in Halle, where Suffrian’s collection is kept, reasonably consisting of material retained by him at the end of his study. The examination of the collections has indeed revealed two specimens (in BMNH and in MLUH) that correspond to these characteristics. The specimen in MLUH bears a label, handwritten by I. Askevold, designating it as holotype, but it should be noted that Askevold never published his observations on this species. However, there is a closer correspondence between the original description and the elytral colour pattern, which is meticulously depicted by Suffrian, of the specimen housed in London. For this reason, it was considered more appropriate to identify such specimen preserved in BMNH as the holotype of the species. Surprisingly, the usual label “67.56” accompanying specimens from the former Clark collection at BMNH was not found. This alphanumeric code typically denotes the accession number and year of acquisition of the material. This label is so ubiquitous that it can be considered the official “signature” of the Clark collection. Conversely, as reported by Michael Geiser (Geiser, personal communication, 2024), shape of the printed label “TYPE” is characteristic of Alexander Fry’s collection but is also found on many specimens from Hamlet Clark’s collection. Additionally, according to Michael Geiser there is evidence that Clark and Fry frequently exchanged specimens and corresponded with each other. Alexander Fry was a businessman in Rio de Janeiro during the 1850s and 1860s, overlapping with Clark’s travels there, suggesting a plausible collaboration in collecting. The label “ Chili ” appears to be written in A. Fry’s distinct handwriting; one intriguing detail is that the “ Chili ” label is trimmed to a smaller size (a practice often seen with specimens received from Fry by H. Clark). Fry’s own specimens from Chile have slightly larger locality labels. Furthermore, the blue label “60 pectinicornis” appears to be in H. Clark’s handwriting. Notably, this specimen was positioned adjacent to a female specimen in the collection bearing the classic “67.56” label. These interesting insights supplied by M. Geiser, while not totally decisive, are compelling. Based on this evidence, I am reasonably confident that the specimen labelled “TYPE” is indeed from Hamlet Clark’s collection and may therefore be considered a type specimen for M. pectinicornis . Clark likely received it from A. Fry and subsequently sent it to Suffrian for identification, a practice he often followed with his Cryptocephalinae . Type designation was made as follows, in order to stabilize the epithet. HOLOTYPE (by present identification): (BMNH), ♂, pinned // “ Chili ” [White label, handwritten] // “TYPE” [White label, printed] // “ Syntype ” [White, blue bordered label, printed] // “60 pertinicornis” [Blue label, handwritten] // “60” [Blue label, handwritten] // “ Mylassa pectinicornis (Suffrian, 1866) ( Cryptocephalus pectinicornis) HOLOTYPUS D. Sassi det.” [red label, printed].</p><p>Type locality. “ Chile ” .</p><p>Additional material examined (70 specimens). ARGENTINA: Chubut: Esquel Lake Verde 17.II.1949 (4, USNMNH) . Neuquén: Chapelco 1000m 28.XII.1951 (1, NHMB) ; Lake Correntoso I.1943 (1, USNMNH) . Río Negro: San Carlos de Bariloche 29.XI.1961 (1, HNHMB) ; Lake Moreno 25.I.1949 (1, USNMNH) ; El Bolsón 02.XII.2003 (1, MDPC) . CHILE: Araucanía: Pucón Villarrica XII.1994 (1, DSPC); 22.9 km E Pucón 870m 1.XII.2013 (3, NMPC) ; Volcán Quetrupillán Parque Nacional Villarrica (5, LSPC); S of Melipeuco 23.I.2004 (34, MSNG &amp; DSPC) ; Las Raíces Cautín XII.1994 (2, DSPC); Pehuenco Parque National Nahuelbuta, 25–28.XI.2013 (1, NMPC) . Bío Bío: Ralco XI.1994 (1, MSNM) . Los Rios: Panguipulli N of Enco 20.I.2004 (1, MSNG) . Maule: Corralones San Clemente 25.XI.2003 (1, MSNG); Romehual, Cordillera Parral XI.1960 (1, DSPC); Fundo Malco, Cordillera Parral XII.1956 (1, DSPC); Talca Vilches Alto Talca prov. 9.X.1995 (1. DSPC) . Ñuble: Las Trancas E Chillán XI.1990 (1, DSPC); Las Trancas 1/15.XII.75 (1, IAPC); Chillán 12.I.1988 on Drimys winteris (2, IAPC) . Santiago (?): “Stgo” XII.1987 (5, IAPC) . The latter record, due to its extremely vague locality indication, is not shown on the distribution map (Fig. 26d), as it would depict an isolated and highly imprecise station located over 200 km north of the confirmed range. This record is considered to require further confirmation.</p><p>Additional data from literature. ARGENTINA: Chubut: Lake Futalafquen (Monrós, 1949); Lake Verde (Monrós, 1949). Neuquén: San Martín de los Andes (Monrós, 1949); Lake Correntoso (Monrós, 1949). Río Negro: San Carlos de Bariloche (Monrós, 1949); Isla Victoria (Monrós, 1949).</p><p>Distribution. Argentina (Chubut, Neuquén, Río Negro); Chile (Araucanía, Biobío, Los Rios, Maule, Ñuble).</p><p>Biological notes. Collected on Lomatia hirsuta subsp. obliqua (Ruiz &amp; Pav.) R. T. Penn. ( Proteaceae) (Monrós, 1949). Among examined specimens, one bears a label indicating Drimys winteri J.R.Forst. &amp; G.Forst. ( Winteraceae) as possible host plant.</p><p>Diagnosis. Mylassa pectinicornis is the species with, on average, the larger size; only M. frigens, M. obliquata, M. monrosi and M. crassicollis can sometimes reach similar body length. However, M. pectinicornis is easily recognizable by the striking characteristic in males of the apical antennal segments strongly modified to form a comb-like structure. Among females with entirely red elytral coloration, only M. rubronotata may resemble it, but in the latter species, the size is significantly smaller, and the shape is more robust. Females with darker elytral coloration are also well distinguished from other species, either because they are entirely black or because the yellow pattern is limited to a thin border along the elytral outline.</p><p>Description of male. Habitus in Figs. 4a–c. BL = 4.2–4.6 mm, BW = 2.3–2.6 mm, PL = 1.5–1.9 mm, PW = 2.2–2.5 mm. Interocular distance 16.7–17.4 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface slightly depressed on vertex and between eyes; mid-cranial suture not clearly detectable; surface almost devoid of pilosity but with well-impressed, close, regularly distributed punctation. Eyes small, scarcely bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines not detectable. Antennae long, almost reaching elytral apex when bent backwards, antennomeres robust, black, sometimes with lighter patches, especially on basal segments, minutely setose; antennomeres 4–7 slightly flattened, scarcely different in shape; antennomere 8 strongly enlarged at apex toward midline in acute denticle; antennomeres 9–11 shell-shaped, shortened and expanded toward midline as well.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, regularly arched so that maximum width at about middle. Posterolateral impressions short and very weakly impressed, close to posterior margin. Pronotal surface covered with close, regularly distributed fine punctation and sparse, short, semi-erect setae. Posterior lobe short, rather slender, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, not raised, very minutely, closely punctured. Surface covered with short setae.</p><p>Elytron totally black. Elytral outline cylindrical, rather slender, regularly convex, with sides almost parallel or slightly convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus prominent, not punctured. Elytral surface matt, with fine punctures arranged in scarcely visible rows and often covered with shallow transverse rugosity. All elytral surface covered with rather short, sparse, semi-erect setae. Epipleura narrow, with plane or slightly concave surface.</p><p>Pygidium black, matt, covered by fine punctures and rather thick, appressed, whitish setae.</p><p>Ventral surface black, matt, with sparse, appressed, whitish setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, square, depressed at centre and raised along sides; sides with sharp denticle at middle; surface coarsely punctured, covered with thick appressed setae; posterior margin straight.</p><p>Legs completely black. Anterior tibiae essentially straight, but apical half broadened inwards to form a laminar, angulate expansion. First tarsomere of anterior legs strongly elongated, laterally compressed, tapered. Median tibiae expanded at apex, without tooth-like process.</p><p>Abdomen in lateral view strongly concave. Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 16a–c) short, squat, terminated by almost truncated apex. Ventral surface strongly concave, crossed by thin, weakly raised, median longitudinal carina. At apex two long, slender setigerous lamellae, each bearing thick setose tuft apically directed.</p><p>Female. Habitus in Figs. 4f–g. BL = 3.9–4.4 mm, BW = 2.3–2.7 mm, PL = 1.6–1.8 mm, PW = 2.2–2.5 mm. Interocular distance 17.9–18.2 % of BL.</p><p>Females differ in lacking anterior and median legs modification, in shorter outline and slightly larger interocular distance. Antennae do not exhibit the strong modification present in males, but antennomeres 8–10 are fairly shortened and flattened. Elytron is usually totally reddish, but individuals with black elytral colour pattern are quite common. In this latter case, anterior, lateral and apical margins are totally or partly yellowish.</p><p>Fifth abdominal ventrite in females with shallow pit with a flat, bald, not punctured base.</p><p>The vasculum of spermatheca is slender, hook shaped (Figs. 24c–d). The lobes of vasculum are not swollen, with proximal one slightly longer. Ampulla is long, subcylindrical and weakly pigmented. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of ampulla. Distal, coiled section of duct is particularly short, while proximal section surrounded by rigid sleeve is about equal in length or even longer than distal one.</p><p>Mylassa rubronotata (Blanchard, 1851)</p><p>(Fig. 5; Figs. 13a; 16d–f; 19a–b; 24e–f; 26e)</p><p>Pachybrachys rubronotatus Blanchard, 1851: 540 (original description).</p><p>Cryptocephalus rubronotatus Suffrian, 1863: 177 (redescription); Clavareau, 1913: 181 (catalogue); Blackwelder, 1946: 646 (catalogue).</p><p>Mylassa rubronotata Jacobson, 1924: 258 (catalogue); Monrós, 1949: 505 (redescription).</p><p>Mylassa socia Stål, 1857: 60 (original description); Jacobson, 1924: 257 (catalogue); Monrós, 1949: 501 (redescription). Syn. nov.</p><p>Cryptocephalus socius Suffrian, 1863: 179 (redescription); Clavareau, 1913: 187 (catalogue).</p><p>Pachybrachys aurantipennis Brèthes, 1929: 208 (original description); Monrós, 1949: 504 (as junior synonym of Mylassa socia, redescription).</p><p>Types. Blanchard (1851) did not mention number of studied specimens; however, he pointed out more than one single locality for Pachybrachys rubronotatus (“ Santiago, Santa Rosa etc.”). In MNHN, in an old box labelled: “Typi Blanchard Chile ” and “ Types de Blanchard Amerique, five syntypes are located: four females and one male (the latter in very poor condition). One female had previously been identified and labelled as lectotypus by I. S. Askevold, but the nomenclatorial act had never been published. The other four specimens bear a round green label without any markings. Only one of these specimens bears an additional handwritten white label stating “ S. Jago S. Rosa ”, which corresponds perfectly to information provided in the original description. Additionally, in a second box of the “historical” collection, seven more specimens were found, divided into two series, with a comprehensive green label placed at bottom of box reading: “ C. rubronotatus Cat. mus. Chili M. Gay ” [green label, handwritten]. Furthermore, four of them bear a round white label stating “ Mr. Gay Chili ” [round white label, handwritten], one bears a round white label reading “67 94” [round white label, handwritten], and the other two have no label. All of these specimens have been considered part of the type series as well. Type designation was made as follows, in order to stabilize the epithet. LECTOTYPE: (MNHN), ♀, pinned // “ Pachybrachys rubronotatus Bl. ” [white label, handwritten] // “Museum Paris Chili Gay 15-43” [round white label, printed] // “15 43” [white label, handwritten] // “Type” [red label, printed] // “ Mylassa rubronotata (Blch.) I. S. Askevold 1987 ” [white label, partly handwritten] // “ Lectotype Pachyrachys rubronotatus Blch. design. IS Askevold 1988” [red label, partly handwritten] // “ Mylassa rubronotata (Blanchard, 1851) ( Pachybrachys rubronotatus) LECTOTYPUS D. Sassi des.” [red label, printed] //. PARALECTOTYPES (11): All paralectotypes were labelled: // “ Mylassa rubronotata (Blanchard, 1851) ( Pachybrachys rubronotatus) PARALECTOTYPUS D. Sassi des.” .</p><p>Although a male is available in the type series, a female has been chosen as lectotype because it better corresponds to the description given by Blanchard, thus allowing us to adhere more closely to Blanchard’s understanding of the species he described.</p><p>Stål (1857) did not mention number of studied specimens of Mylassa socia, but a single syntype was found in SMNH. Type designation was made as follows, in order to stabilize the epithet. LECTOTYPE (by present designation): (SMNH), pinned // “ Chili ” [White label, printed] // “Fairm.” [White label, handwritten] // “Typus” [Red label, printed] // “socius Stål ” [White label, handwritten] // “ Mylassa socia Stål 1857 LECTOTYPUS D. Sassi des.” [red label, printed]. However, careful examination of available material does not reveal differences between specimens assignable to this taxon and those belonging to M. rubronotata . Different elytral coloration, the only character that would be significant according to original descriptions and comparing type specimens, is actually frequently observable, with evident transitional forms, in specimens from the same collection localities. Also, diagnostic characters indicated by Monrós (1949), i.e. vague differences in overall shape and morphology of apex of aedeagus, are not confirmed by my study. Therefore, the following new synonymy is proposed here: Mylassa rubronotata (Blanchard, 1851) = Mylassa socia Stål, 1857 syn. nov.</p><p>It should be noted that while in revision of the genus, Monrós (1949) maintained that M. socia and M. rubronotata were certainly two distinct species, he also reported having been able to examine only one male of M. socia, and only a few years later he seems to have harbored doubts regarding this certainty, as material housed in Basel, determined by him, bears the indication: “ Mylassa rubronotata var. socia, Monrós det. 1952”. Additionally, it is interesting to note that Suffrian himself (1863), while keeping the two taxa separate, raises likelihood that M. socia may actually be the male of M. rubronotata .</p><p>Regarding Pachybrachys aurantipennis, Brèthes does not indicate number of studied specimens, but reports two different values for body length, so it is reasonable to assume that he examined more than one specimen. Monrós claimed he could see the type, preserved in the Brèthes collection at the Museo Argentino de Ciencias Naturales (MACN). He added that the specimen beared an autographed label with inscription ‘ Pachybrachys aurantipennis — Type!’ and a second label, apparently by the same author, with the name ‘ Cryptocephalus,’ and stated that it was identical to Mylassa socia . Unfortunately, it appears that currently no specimen of the type series of P. aurantipennis is present in the collections of the MACN (thanks to the kind collaboration of Gastón E. Zubarán, who kindly conducted a thorough search to facilitate my study). The possibility that the specimen mentioned by Monrós has not been returned was also explored, but there is no trace of it even in the collection of this author, now preserved at the USNMNH. Therefore, it is highly probable that the specimen has been lost. Consequently, the synonymy with Mylassa socia, and therefore with M. rubronotata, is accepted based on Monrós account (Monrós,1949).</p><p>Type locality Pachybrachys rubronotatus: “ Chile ” (Despite two less generic localities being present in the original description (Blanchard, 1851) and on a single label, none of the specimens assigned to the type series bears any reliable specific indication of provenance); Mylassa socia and Pachybrachys aurantipennis: “ Chile ”.</p><p>Additional material examined (377 specimens). CHILE: Biobío: Los Angeles I.1953 (1, USNMNH) ; Contulmo (1, NHMB); Yumbel 300m 19.XI.1985 on Retanilla ephedra (Brongn.) (7, IAPC) . Coquimbo: Los Vilos env. 15.XI.2003 (1, MSNG) . Maule: Cayurranquil W Cauquenes 400m 23–31.I.1981 (1, USNMNH); Robleria Linares 23.II.2003 (22, MSNG &amp; MNHUB) ; Curicó Los Morongos X.1994 (1, MSNM) ; 10 km E Curicó 22–31.XII 1997 (1, DSPC) ; Curicó E of Potrero Grande 10.XII.2003 (45, MSNG &amp; MNHUB) ; Curicó 15 km E Potrero Grande 25.XI.2003 (1, DSPC) ; Los Queñes Teno (2, DSPC); Corralones San Clemente 25.XI.2003 (1, MSNG) ; Bäder von Longavi, Parral, (1, MNHUB) . Ñuble: Chillán Las Trancas XII.2003 (2, MSNM) . Santiago: Laguna de Aculeo (52, DSPC) ; Rio Maipo (20, DSPC) ; El Canelo I.1930 &amp; IX.1948 &amp; XII.1948 &amp; XII.1949 &amp; XII.1951 &amp; 6.I.1953 (71, NHMB &amp; USNMNH ; Cajón de Lisboa [Melipilla, Alhué] XII.1989 (3, DSPC) ; Cerro La Obra 900m 9.XII.1986 on Retanilla ephedra (Brongn.) (5, IAPC) ; La Obra 800m 16–25.XII.1986 (7, IAPC); La Obra 800m 14–16.XII.1986 (72, IAPC); Rancagua Q.La Goyana SE Aculeo 1800m XII.1981 (18, IAPC); El Canelo 1977 (14, IAPC); “Santiago” (1, MNHUB) . Valparaíso: “Valparaíso” E. P. Reed B. M. 1934-317 1922 (9, BMNH); “Valparaíso” 1922 (2, MNHUB). “D. Ed. Varas Arangua 1921” (20, MSNG) . “ Chile ”: (4, NMPC). “ South America ”: (1, SNMS) .</p><p>Additional data from literature. CHILE: Coquimbo: “Coquimbo” (as M. socia) (Suffrian, 1863). Los Ríos: Coñaripos (Coñaripe?) Valdivia Prov. (Monrós, 1949). Santiago: El Canelo; San Jose de Maipo (Monrós, 1949); Bosque de Santiago (El Bosque?) (Monrós, 1949); Alhué, Melipilla prov. (Monrós, 1949).</p><p>Distribution. Chile (Biobío, Coquimbo, Los Ríos, Maule, Ñuble, Santiago, Valparaíso). Indication “Lima” reported by Suffrian (1863) for a specimen from the Kraatz collection appears unreliable, likely due to labelling error. Further confirmation is necessary to consider the species present so far north of its distribution centre.</p><p>Biological notes. According to label data, a few specimens examined in this study were collected on Retanilla ephedra (Vent.) Brongn. ( Rhamnaceae).</p><p>Diagnosis. Mylassa rubronotata, along with M. flavolimbata, M. daccordii, M. postmediana, M. longicornis, and M. mirabilis, belongs to the subgroup of smaller-sized species, but it is distinguished from all others by the stockier outline and the significantly more extensive red coloration on elytra. In the latter ones, by contrast, light elytral pattern is limited to two rather small, reddish or yellowish spots, always separated from each other, the first located halfway along outer area of elytra and the second at apex, never extending over more than half the elytral surface. In males of M. rubronotata, antennomeres are stout and slightly flattened; slender and cylindrical in other small-sized species. Additionally, in males, anterior tibiae do not show any particular modifications, as observed in almost all other species of the genus. M. daccordii is an exception, for its males also have unmodified anterior tibiae, but dorsal coloration of the specimens, as said above, is completely different.</p><p>Description of male. Habitus in Fig. 5f. BL = 2.5–3.2 mm, BW = 1.6–1.9 mm, PL = 1.0– 1.2 mm, PW = 1.5–1.8 mm. Interocular distance 18.8–20.0 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface covered with fine, regularly distributed punctation and thick, short appressed pilosity, crossed by hollow linear depression, mid-cranial suture not clearly detectable. Eyes small, scarcely bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, barely visible only along upper ocular margin. Antennae almost reaching elytral clivus when bent backwards, antennomeres robust, minutely setose, 1–5 yellowish, remainders progressively darkened; antennomere 3 short, less than two times as long as the second one; 4–10 robust, slightly flattened, scarcely different from each other in length and shape.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, almost straight, regularly converging towards anterior margin so that maximum width near basal margin. Posterolateral impressions short and very weakly impressed, close to posterior margin. Pronotal surface covered with close, regularly distributed fine punctation and rather thick, short, appressed, whitish setae. Posterior lobe slender, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, pointed, not raised, very minutely and closely punctured; surface covered with short setae.</p><p>Elytron reddish with suture, anterior and lateral margins black ( “ socia form”). Black sutural pattern sometimes broadened at about midline or along whole anterior half. Less frequently, black pattern extended to form a black transverse line connecting lateral margin to suture just behind midline, splitting reddish pattern into two separate subrounded spots, anterior one distinctly larger ( “ rubronotata form”). Elytral outline cylindrical, rather short, regularly convex, with sides almost parallel or slightly convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus prominent, not punctured. Elytral surface matt, with fine punctures arranged in well-visible, almost regular rows. All elytral surface with sparse, short, appressed setae. Sometimes such pilosity almost missing. Epipleura narrow, with plane or slightly concave, slightly rugose and shortly setose surface.</p><p>Pygidium black, matt, covered by very fine punctures and rather thick, appressed, whitish setae.</p><p>Ventral surface black, matt, covered with thick, long, appressed, whitish setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, short and transverse, with sides raised at middle in small tooth-like process; posterior angles broadened and pointed; surface finely punctured, covered with thick appressed setae; posterior margin straight.</p><p>Legs completely black.Anterior and median tibiae with no sexual modifications. Anterior and median tarsomeres slightly swollen.</p><p>Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 16d–f) short, squat. Ventral surface strongly concave with no clues of median carina. Shaft terminated with blunt, short triangular apex. Setose depressions slender, shallow, scarcely delimited, extended along sides up to middle of shaft. Setigerous lamellae, small, elliptical, with single line of setae along distal edge.</p><p>Female. Habitus in Fig. 5e. BL = 3.1–3.3 mm, BW = 2.0– 2.1 mm, PL = 1.2–1.3 mm, PW = 1.9–2.0 mm. Interocular distance 19.4–21.2 % of BL.</p><p>Females differ in larger size, slenderer anterior and median tarsomeres, shorter outline and slightly larger interocular distance, shorter and slenderer antennae. The most common elytral colour pattern is “ rubronotata form” which is quite rare in males. Conversely, the most frequent male design ( “ socia form”) is decidedly rare in females.</p><p>Fifth abdominal ventrite in females with shallow pit with a flat, bald, slightly shiny, not punctured base.</p><p>Vasculum of spermatheca (Figs. 24e–f) is slender, hook-shaped, with proximal and distal lobes not swollen, approximately of same length. Distal lobe is mildly tapered towards a pointed and straight apex. Ampulla is lengthened, cylindrical. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of ampulla. Duct is fine, long, not coiled but forming a loose tangle at about mid length. Proximal section is thickened, rigid and curved.</p><p>Remarks. Variation in elytral colour pattern, which caused previous authors to describe and consider two different species, seems to be an interesting example of incomplete sexual dimorphism.</p></div>	https://treatment.plazi.org/id/03AF61160E28FF9CFF45FDB5FBE9FAF0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E3EFF9FFF45FA15FC3CFADC.text	03AF61160E3EFF9FFF45FA15FC3CFADC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa monrosi Sassi 2025	<div><p>Mylassa monrosi sp. nov.</p><p>urn:lsid:zoobank.org:act: 1FFF733D-282D-470A-BB8B-5A2AA601F93A</p><p>(Fig. 6; Figs. 13b; 16g –i; 21a–c; 23e–f; 27a)</p><p>Mylassa obliquata Monrós, 1949: 516 (misinterpretation).</p><p>Types. HOLOTYPE: CHILE: Los Lagos: (BYU), ♂, body and detached abdomen glued on same card, median lobe of aedeagus glued on different card, // “ CHILE, prov. Osorno, Antillanca, 3700 ft., 10-II-1968, C.W. &amp; L.B O’Brien ” [white label, printed] // “ Mylassa monrosi sp. nov . HOLOTYPUS D. Sassi des.” [red label, printed] //. PARATYPES (48): ARGENTINA: Chubut: (MDPC), 3♂ 2♀, // “Argentina—Chubut Parc. Nacio. Los Alerces 700–1200m, 16.III.1974, leg. Carlo Bordon ” [white label, printed] //; (DSPC), 1♂ 1♀, // “ Los Alerces 1100m Chubut” [white label, printed] // “ Arg. Bordón leg. 11.III.1974 ” [white label, printed] //. Neuquén: (USNMNH), 1♂, // “ 28.XII.1951 Chapelco 1000m <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Terr.</a> Neuquen l. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Skhajovskoi</a> ” [white label, printed] // “ F. Monros collection 1959” [white label, printed] //. Río Negro: (USNMNH), 1♂ 1♀, // “RA.—Neuquen <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Nahuel Huapi Llao-llao</a> I.1943 <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Monrós</a> ” [white label, handwritten] // “ F. Monros collection 1959” [white label, printed] // “ Mylassa obliquata (Suffr.) F. Monrós det. 1949” [white label, partly printed] // “ Mylassa concinna (Phil.) det. I.S. Askevold 1993” [white label, partly printed] //. CHILE: Araucanía: (DSPC), 1♀ // “Chile I-1962 Cord. Lonquimay Sierra Nevada” [white label, printed] //; (IAPC), 1♀, // “ <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Malleco Prov.</a> Parc Nac Nahuelbuta 1100 m <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Jan</a> 5–8.89 Coll. C.L. Bellamy ” [white label, printed] //. Los Lagos: (BYU &amp; DSPC), 6♂ 7♀, same data of the holotype; (MSNG), 1♀, // “ Chile W, Reg. X Entre Lagos 12.II.2005 W of Anticura M. Snížek lgt.” [white label, printed] // “ <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Museo Genova</a> ex coll. M. Snizek acquisto 2010” [white label, printed] //; (DSPC), 1♀, // “Chile 200m prov. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Llanquihue Petrohué</a> 25.II.1972 ” [white label, printed] //; (USNMNH), 2♀, // Chile: “ Osorno P. N. Puyeuhe <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Río Anticura</a> 31 <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Jan</a> –13 <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Feb</a> 78 C.M. &amp; O.S. Flint, Jr.” [white label, printed] // “ Mylassa concinna (Philippi) det. I.S. Askevold 1993” [white label, partly printed] //; (NMPC), 3♀, // “Chile: X. Los Lagos Region PN Puyehue, 2.0 km E of Anticura Río Colorado at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.14667&amp;materialsCitation.latitude=-40.671665" title="Search Plazi for locations around (long -72.14667/lat -40.671665)">Puente</a> Arauco, 40° 40.3’S 72° 8.8’W, 465m, 8.xii.2013, Fikáček, Kment &amp; Vondráček lgt. CH34” [white label, printed] //; (USNMNH), 1♂ 1♀, // “Trovador 1500m 31.1.49” [white label, handwritten] // “ F. Monros collection 1959” [white label, printed] //; (DSPC), 1♂ 2♀, // “ Chile Ayren II-1990 ” [white label, printed] //; (SMNS), 1♂ // “ Sud-Chile A. Büttocher ” [white label, printed] // “Cryptocephal. rubronotatus Blanch. Sud-Chile ” [white label, handwritten] //; (SMNS), 1♀ // “Sud Chile” [white label, printed] // “Cryptocephal rubronotatus Blanch. Sud-Chile ” [white label, handwritten] //; (IAPC), 3♀, // “ CHILE, Petrohue/ Llanquihue 13.I.1980 Luis Peña” [white label, partly handwritten]; (IAPC) , 1♂, // “ Osorno Jihron ” [white label, handwritten] // “Zool. Mus. Berlin” [white label, printed] // “ In exchange from: Zool. Mus. Berlin IS Askevold Coll’n. ” [white label, partly handwritten] // “ Mylassa obliquata (Suff.) det I. S. Askevold 1987” [white label, partly handwritten] //. Los Ríos: (IAPC), 2♂ 1♀, // “ Valdivia Prov. 3 km W Las Lajas W La Union 650m 1.10.1989 Coll. C.L. Bellamy ” [white label, printed] //; (IAPC), 1♀, // “ Valdivia Prov. Las Lajas (las Tables) W La Union 600m Jan. 11.1989 C.L. Bellamy ” [white label, printed] //; (IAPC), 1♀, // “ Valdivia Prov. Parc Nac. El Azerzal [presumed transcription error; locality likely refers to Alerce Costero National Park] 900m Jan 10 1989 Coll. C.L. Bellamy ” [white label, printed] //. All paratypes also labelled: // “ Mylassa monrosi sp. nov . PARATYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality. Antillanca (Región de Los Lagos, Chile) .</p><p>Etymology. The species is dedicated to the Hispanic-Argentinian entomologist Francisco de Asis Monrós, who extensively studied Mylassa and first studied part of these specimens but failed to recognize them as a new species.</p><p>Additional data from literature. As M. obliquata: ARGENTINA: Neuquén: Northern shore of Lake Lacar (Monrós, 1949); Río Negro: Lake Nahuel Huapi (Monrós, 1949).</p><p>Distribution. Argentina (Chubut, Neuquén, Río Negro); Chile (Araucanía, Los Lagos, Los Ríos).</p><p>Biological notes. No data available.</p><p>Diagnosis. Due to its relatively large size and elytral coloration, this species bears a strong resemblance to M. frigens, from which, however, it differs in having a more opaque and denser punctuated pronotum. Furthermore, the dorsal pilosity is rather short and appressed, whereas in M. frigens, the setae are much longer and tend to be erect. Additionally, sexual characteristics at the apex of the male’s anterior tibiae are less pronounced. Lastly, shape of the aedeagal apex is completely different. M. obliquata is also very similar, and in some cases, females of the two species may be very difficult to distinguish. However, closely spaced pronotal punctures, which render the pronotal surface opaque in M. monrosi, typically prove to be an effective diagnostic trait. Moreover, the reddish pattern on elytra is usually more developed in M. obliquata, above all along the basal margin. Regarding males, absence of the tooth-like process at the apex of the inner margin of the median tibiae, and reduction of the subapical denticle on anterior tibiae in M. monrosi, allow for easy differentiation.</p><p>Description of male. Habitus in Figs. 6a–c (HT). BL = 3.5–3.7 mm, BW = 2.1–2.2 mm, PL = 1.3–1.4 mm, PW = 2.0– 2.1 mm. Interocular distance 14.3–16.2 % of BL.</p><p>Head and labrum totally black. Vertex and frontoclypeal surface almost regularly convex, with sparse short setae and minute, close, regularly distributed punctation. Mid-cranial and frontoclypeal sutures not clearly detectable. Eyes small, scarcely bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines not detectable.Antennae long, reaching elytral apex when bent backwards, antennomeres robust, brown (1–3 sometimes slightly paler), bright, scarcely setose; antennomeres 4–10 subcylindrical, scarcely different in shape.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, perceptibly convergent forwards, with maximum width behind middle. Posterolateral impressions short and shallow, close to posterior margin. Pronotal surface covered with close, regularly distributed well-impressed punctation and short, appressed whitish setae. Posterior lobe almost parallelsided, narrow, rather long, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, not raised, very minutely punctured, surface covered with short, whitish setae.</p><p>Elytron black with oblique reddish spot at about midline, between fourth and eighth rows of punctures. Further reddish spot at apex. Sometimes additional small marking, reddish as well, close to anterior margin. Elytral outline cylindrical, rather slender, regularly convex, with sides almost parallel or slightly convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytral surface matt, with punctures arranged in almost regular rows, well impressed on anterior half of surface, barely distinguishable towards apex. All elytral surface covered with rather short, sparse, appressed whitish setae. Sometimes pilosity arranged into nearly regular rows. Epipleura narrow, with flat or slightly concave, matt surface, marked with shallow punctures.</p><p>Pygidium black, covered by fine punctures and rather thick, whitish setae.</p><p>Ventral surface black, matt, shallowly but closely punctured, covered with long, appressed, whitish setae, except scarcely setose, shiny, not punctured posterior half of hypomera and central part of metasternum. Prosternal process wide, transverse, depressed along midline and raised at sides; sides with sharp denticle at middle; surface minutely punctured, covered with thick appressed setae; posterior margin rounded.</p><p>Legs totally black. Anterior tibiae slightly expanded and bent inwards at apex, with small subapical denticle on inner rim. Sometimes subapical denticle scarcely detectable. Apex of median tibiae slightly expanded but devoid of tooth-like process.</p><p>Abdomen in lateral view strongly concave. Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 16g –i) in ventral view terminated with short, rounded apex weakly delimited from rest of shaft. Aedeagal ventral surface smooth, with only hint of low, short, longitudinal carina. Setose depressions slender, shallow, scarcely delimited, with setae thicker on apical end. Setigerous lamellae large, triangular, bearing long, thick setae.</p><p>Female. Habitus in Figs. 6d–f. BL = 3.6–4.1 mm, BW = 2.3–2.7 mm, PL = 1.5–1.6 mm, PW = 2.2–2.4 mm. Interocular distance 16.7–17.1 % of BL.</p><p>Female differs in the stockier body, the shorter antennae and, usually, the more extended light colour pattern on elytron.</p><p>Fifth abdominal ventrite in female with shallow, rounded pit with a flat, not punctured, bright base.</p><p>The vasculum of spermatheca (Figs. 23e–f) is slender, hook-shaped, with proximal and distal lobes not swollen, approximately of same length. Distal lobe is slightly pigmented towards apex. Ampulla is lengthened, cylindrical. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of ampulla. Duct is short, coiled along its distal section while the proximal section surrounded by the rigid sleeve is about equal in length or even longer than distal one.</p><p>Remarks. In DSPC, three specimens are hosted which bear a label stating: ‘ Chile, Ayren II.1990.’ Apparently, this placename does not seem to correspond to any documented locality in Chile. If it were a typographical error and the location in question were instead Aysén, this would be of considerable interest, as it would imply an extension of the southern limit of the species’ distribution to at least the 46th parallel of south latitude. However, further reliable confirmations are needed before considering this hypothesis acceptable.</p></div>	https://treatment.plazi.org/id/03AF61160E3EFF9FFF45FA15FC3CFADC	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E3DFF99FF45FA79FE49FBBC.text	03AF61160E3DFF99FF45FA79FE49FBBC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa fuliginosa Sassi 2025	<div><p>Mylassa fuliginosa sp. nov.</p><p>urn:lsid:zoobank.org:act: 7A9D28F4-4B86-4ACF-BE35-20B55141E3E1</p><p>(Figs. 7a–c; 13c; 25a; 27b)</p><p>Types. HOLOTYPE: CHILE: Biobío: (MSNM), ♀, body and detached abdomen glued on same card, genitalia glued on different card, // “ CHILE XII.58 Cord. Nahuelbuta Pichinahuel” [white label, printed, date handwritten] // “ Mylassa fuliginosa sp. nov . HOLOTYPUS D. Sassi des.” [red label, printed] //. PARATYPES (2): CHILE: Biobío: (DSPC), ♀, same data of the holotype; (DSPC), ♀, // “ CHILE I.59 Cord. Nahuelbuta Pichinahuel” [white label, printed, date handwritten] //. Both paratypes also labelled: // “ Mylassa fuliginosa sp. nov . PARATYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality. Cerro Pichinahuel ( Cordillera de Nahuelbuta, Región del Biobío, Chile) .</p><p>Etymology. The species name fuliginosa derives from the Latin fuliginosus meaning ‘sooty’ or ‘smoky,’ in reference to the dull black coloration of the body.</p><p>Distribution. Chile (Biobío).</p><p>Biological notes. No data available.</p><p>Diagnosis. Mylassa fuliginosa is of relatively large size, easily distinguished from other species by its rather stout shape and almost oval outline, and especially by its entirely black coloration and opaque tone of the elytral surface, due to the dense micropunctation of interstriae, which are traversed by regular rows of closely appressed, white setae.</p><p>Description of female (male unknown). Habitus in Figs. 7a–c (HT). BL = 4.0– 4.3 mm, BW = 2.6–2.7 mm, PL = 1.4–1.8 mm, PW = 2.4–2.5 mm. Interocular distance 16.3–17.5 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface covered with well-impressed, regularly distributed punctation and thick, long, appressed, whitish setae; mid-cranial and frontoclypeal sutures not detectable. Eyes large, bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines barely visible. Antennae black, sometimes with lighter patches, especially on basal segments, short, scarcely reaching elytral middle when bent backwards; antennomeres 3–5 subcylindrical; 6–10 slightly flattened; 4–11 scarcely differing in length.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, regularly and mildly arched, converging towards anterior margin so that maximum width about at basal margin. Posterolateral impressions short and weakly impressed, close to posterior margin. Pronotal surface covered with close, well-impressed, regularly distributed shallow punctation and thick, appressed, whitish setae. Posterior lobe large, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, pointed, not raised, setose and regularly punctured.</p><p>Elytron totally black. Elytral outline cylindrical, regularly convex, with sides slightly convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus moderately prominent, not punctured. Elytral surface with punctures arranged in well-impressed, regular rows. Interstriae finely rugulose, covered with thick semi-appressed, whitish setae. Epipleura narrow, setose, with plane, finely punctured surface.</p><p>Pygidium black, matt, covered by very fine punctures and long, appressed setae.</p><p>Ventral surface black, matt, finely and densely punctured, with short, appressed setae, except scarcely setose, shiny posterior part of hypomera and mesoepimera. Prosternal process wide, short, roughly squared; sides with sharp denticle at middle; surface with scattered punctures and sparse, long setae; posterior margin not raised, slightly notched at middle.</p><p>Legs completely black. Tibiae with no modifications, only mildly curved inward towards apex.</p><p>Fifth abdominal ventrite with shallow rounded pit with flat, almost bald, not punctured, shiny base.</p><p>The vasculum of spermatheca (Fig. 25a) is slender, hook shaped. Lobes of vasculum not swollen, distal one shorter than proximal one. Ampulla long, subcylindrical and weakly pigmented. Duct insertion and sperm gland insertion fully separate, the latter sitting on apex of ampulla. Duct short, coiled, with its proximal half surrounded by rigid and opaque sleeve.</p></div>	https://treatment.plazi.org/id/03AF61160E3DFF99FF45FA79FE49FBBC	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E3BFF9BFF45FB59FA80F934.text	03AF61160E3BFF9BFF45FB59FA80F934.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa flavolimbata Sassi 2025	<div><p>Mylassa flavolimbata sp. nov.</p><p>urn:lsid:zoobank.org:act: 614A13BC-C283-4356-B300-48C43883EE3B</p><p>(Fig. 8; Figs. 13d; 17a–c; 25b; 27d)</p><p>Types. HOLOTYPE: CHILE: Maule: (MSNG), ♂, body and detached abdomen glued on same card // “ CHILE, CE, reg. VII Linares Robleria env. 23.XI.2003 Leg. M. Snížek ” [white label, printed] // “ Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] // “ Mylassa flavolimbata sp. nov . HOLOTYPUS D. Sassi des.” [red label, printed] //. PARATYPES (22): CHILE: Maule: (MSNG), 3♂, same data of the holotype; (MSNG), 6♂ 8♀, // “ CHILE, CE, reg. VII Longaví, El Transito env. 22.XI.2003 Leg. M. Snížek ” [white label, printed] // “Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] //; (DSPC), 1♀, // “ CHILE XII.57 Cord. Parral Fundo [Puente?] Malcho” [white label, printed, date handwritten] //; (MSNG), 1♂, // “ CHILE, CE, reg. VII Talca, 27.XI.2003 W of Vilches Alto Leg. M. Snížek ” [white label, printed] // “Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] //. Ñuble: (MSNG), 1♀, // “ CHILE, CW, reg. VIII SW of Quirihue, 4.XII.2003 Leg. M. Snížek ” [white label, printed] // “ Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] //; (HNHMB), 1♂, // “Chile” [white label, printed] // “ Cryptocephal. sp. coll. Geitner ” [white label, partly printed] //; (DSPC), 1♂, // “ CHILE Bulileo [sic] [Embalse Bullileo] [white label, printed].All paratypes also labelled: // “ Mylassa flavolimbata sp. nov . PARATYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality Robleria ( Provincia de Linares, Región del Maule, Chile) .</p><p>Additional material examined. Pictures of this species (apparently the same specimen) are showed on iNaturalist (https://www.inaturalist.org/observations/196607424 and https://www.inaturalist.org/observations/196301354), reported from the neighborhood of Purén, Araucanía, Chile).</p><p>Etymology. The species name flavolimbata derives from the Latin flavus (‘yellow’) and limbatus (‘bordered’), referring to the broad yellow pattern along the sides of the elytra.</p><p>Distribution. Chile (Araucanía, Maule, Ñuble) (first Region from some iNaturalist records).</p><p>Biological notes. No data available.</p><p>Diagnosis. Mylassa flavolimbata belongs to the subgroup of small-sized species with black elytral coloration featuring a lateral-median yellow spot and a second one at the apex of the elytron. Among these species, the most similar is M. longicornis, from which it can be distinguished by the larger and differently (longitudinally) arranged lateral yellow spot. In M. daccordii, the elytral yellow spots are decidedly smaller (sometimes almost obliterated), and the punctation of the pronotum is distinctly more pronounced and spaced. Besides, the shape of median tibiae is unique among the known species, being sharply compressed and bent inwards at apex. Additionally, in M. daccordii the antennomeres are shorter and evidently flattened (long and filiform in M. flavolimbata).</p><p>Description of male. Habitus in Figs. 8a–c (PT). BL = 2.6–2.8 mm, BW = 1.6 mm, PL = 1.0– 1.1 mm, PW = 1.4–1.5 mm. Interocular distance 17.9–19.2 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface covered with well-impressed, regularly distributed punctation and scattered short whitish setae; mid-cranial and frontoclypeal sutures not clearly detectable. Eyes large, bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, barely visible. Antennae long, reaching elytral clivus when bent backwards, antennomeres slender, black (2–3 slightly lighter), minutely setose; antennomeres 4–11 subcylindrical, scarcely different from each other in length and shape.</p><p>Pronotum totally black, convex. Lateral margins narrow, not visible from above, almost straight, weakly converging towards anterior margin so that overall outline almost square, maximum width about at basal margin. Posterolateral impressions long, obliquely departing from posterior margin towards sides, well impressed so that central part of disc looking fairly bulging. Pronotal surface covered with close, regularly distributed, very fine punctation. Posterior lobe slender, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, pointed, not raised, bare, rather coarsely punctured.</p><p>Elytron black with large, elliptical, longitudinally arranged yellow spot extended from humeral callus to just behind middle, between fourth and ninth rows of punctures; further yellow spot at apex. Elytral outline cylindrical, regularly convex, with sides parallel, i.e. not convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytral surface bare, with punctures arranged in well-impressed, almost regular rows; in studied specimens, punctuation on central part of disc scarcely visible as surface covered by fine but thick roughness. Epipleura narrow, with weakly concave, slightly rugose surface.</p><p>Pygidium black, matt, covered by very fine punctures and short, appressed setae.</p><p>Ventral surface black, matt, finely and densely punctured, with short, appressed setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, short and transverse, basically flat at centre; sides with sharp, thorn-shaped denticle at middle; posterior margin raised at middle in pointed process; surface minutely punctured, with sparse, long setae.</p><p>Legs completely black.Anterior tibiae strongly bent at apex, with apical, sharp denticle forwards directed. Median tibiae strongly compressed and bent inwards at apex, with sharp apical denticle.</p><p>Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 17a–c) moderately lengthened. Ventral surface weakly concave, smooth, devoid of longitudinal carina. Shaft terminated with weakly pointed, shortly triangular apical edge. Setose depressions shallow, barely delimited, with setae thicker on apical end. Setigerous lamellae small, roughly elliptical with few short apical setae.</p><p>Female. Habitus in Figs. 8d (PT). BL = 3.4 mm, BW = 2.0 mm, PL = 1.3 mm, PW = 1, 9 mm. Interocular distance 20.6 % of BL.</p><p>The single available female differs in larger size, slightly larger ocular distance, stouter outline, absence of sexual modification on the anterior and median tibiae, and shorter antennae which scarcely extend past midline when bent backwards.</p><p>Fifth abdominal ventrite with shallow rounded pit with a flat, scarcely setose, not punctured base.</p><p>Vasculum of spermatheca (Fig. 25b) slender, moderately pigmented, hook-shaped, with proximal and distal lobes not swollen, the latter slightly shorter, mildly tapered to pointed, down-turned apex. Proximal lobe fairly bent at base. Ampulla lengthened, cylindrical. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of ampulla. Duct short, coiled. Proximal section embedded in a thickened, rigid sleeve.</p></div>	https://treatment.plazi.org/id/03AF61160E3BFF9BFF45FB59FA80F934	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E39FFA6FF45F8D1FCEDFF5C.text	03AF61160E39FFA6FF45F8D1FCEDFF5C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa daccordii Sassi 2025	<div><p>Mylassa daccordii sp. nov.</p><p>urn:lsid:zoobank.org:act: 872FDA28-8898-4E51-B577-C57D6118FE63</p><p>(Fig. 9; Figs. 14a; 17d–f; 25c; 27d)</p><p>Types. HOLOTYPE: CHILE: Araucanía: (MSNM), ♂, body, aedeagus and detached abdomen glued on same card // “CHILE I-2000 Malleco Prov. Lonquimay” [white label, printed] // “ Mylassa daccordii sp. nov . HOLOTYPUS D.</p><p>Sassi des.” [red label, printed] //. PARATYPES (55): CHILE: Araucanía: (MSNM &amp; DSPC &amp; MDPC), 30m 22♀, same data of the holotypes (for some specimens the date is reported as “I-00”), //; (DSPC), 1♀, // “CILE [sic] Las Raices Cautin XII-94” [white label, printed] //; (DSPC), 1♀, // “CHILE I-1962 Cord. Lonquimay Sierra Nevada” [white label, printed] //; 1♂, (USNMNH) // “ Las Cabinas [?] 10.XII.54, 1480m Chile leg. Pena ” [white label, partly printed] // “ F. Monrós Collection 1959” [white label, printed] // “ Pachybrachis segethi (Philippi) det. I.S. Askevold 1993” [white label, partly printed] //. All paratypes also labelled: // “ Mylassa daccordii sp. nov. PARATYPUS D. Sassi des.” [red label, printed] // .</p><p>Type locality. Lonquimay ( Provincia de Malleco, Región de la Araucanía, Chile) .</p><p>Etymology. The species is named in honor of Mauro Daccordi, an esteemed chrysomelid specialist, in recognition of his significant contributions to the study of Chrysomelidae .</p><p>Distribution. Chile (Araucanía).</p><p>Biological notes. No data available.</p><p>Diagnosis. Together with Mylassa flavolimbata, M. longicornis, and M. postmediana, this species belongs to the subgroup of small-sized species with elytra black and two (lateral-median and apical) yellow spots. Among them, Mylassa daccordii is characterized by relatively short and flattened antennomeres in males. Additionally, pronotal punctation is stronger and less closely arranged, and elytral yellow spots are distinctly smaller.</p><p>Description of male. Habitus in Figs. 9e (HT), 9f (LT). BL = 2.5–2.7 mm, BW = 1.6–1.9 mm, PL = 0.9–1.0 mm, PW = 1.3–1.4 mm. Interocular distance 14.8–20.0 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface bare, covered with well-impressed, regularly distributed punctation, mid-cranial and frontoclypeal sutures not clearly detectable. Eyes large, bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, barely visible. Antennae short, reaching elytral half when bent backwards, antennomeres robust, black, sometimes with lighter patches, especially on basal segments, minutely setose; antennomeres 4–11 cylindrical, scarcely different from each other in length and shape.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, almost straight, regularly converging towards anterior margin so that maximum width about at basal margin. Posterolateral impressions short and weakly impressed, close to posterior margin. Pronotal surface bare, covered with close, regularly distributed shallow but coarse punctation. Posterior lobe slender, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, pointed, not raised, bare, very minutely and sparsely punctured.</p><p>Elytron black with elliptical, transverse yellow spot just before middle, between fifth and ninth rows of punctures; further yellow spot at apex. Elytral outline cylindrical, regularly convex, with sides parallel, i.e. not convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus prominent, not punctured. Elytral surface bare, with punctures arranged in well-impressed, almost regular rows. Epipleura narrow, with plane or weakly concave, slightly rugose surface.</p><p>Pygidium black, matt, covered by very fine punctures and short, appressed setae.</p><p>Ventral surface black, matt, finely and densely punctured, with short, appressed setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, short and transverse; sides with sharp denticle at middle; surface minutely punctured, with scarce, short setae; posterior margin rounded, almost smooth, devoid of punctures and setae.</p><p>Legs completely black, with no sexual modifications.</p><p>Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 17d–f) short, squat. Ventral surface mildly concave, smooth, with no clues of median carina. Shaft terminated with blunt, very short, slightly arched apex. Setose depressions slender, shallow, scarcely delimited, extended along sides up to middle of shaft. Setigerous lamellae small, triangular, bearing few short setae.</p><p>Female. Habitus in Figs. 9a–b. BL = 3.0– 3.1 mm, BW = 1.9–2.0 mm, PL = 1.1–1.2 mm, PW = 1.7 mm. Interocular distance 19.4–20.0 % of BL.</p><p>Females differ in larger size, the stouter outline, and shorter antennae which scarcely overrun midline when bent backwards.</p><p>Fifth abdominal ventrite in females with shallow rounded pit with a flat, bald, not punctured base.</p><p>Vasculum of spermatheca (Fig. 25c) slender, hook-shaped, with proximal and distal lobes not swollen, the latter one slightly shorter, mildly tapered into pointed, downturned apex. Ampulla lengthened, cylindrical, pigmented. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of ampulla. Duct fine, short, not coiled but forming a loose tangle close to basis of vasculum. Proximal section is embedded in a thickened, rigid sleeve.</p><p>Remarks. One specimen in USNMNH bears a handwritten label by I.S. Askevold, which would identify it as belonging to Pachybrachis segethi Philippi, 1859 . Unfortunately, the type material of the species described by Philippi (1859), despite repeated attempts, is currently untraceable. However, based on scant original description, P. segethi should be quite different from the species described here.</p></div>	https://treatment.plazi.org/id/03AF61160E39FFA6FF45F8D1FCEDFF5C	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E04FFA0FF45FEC6FE1DFE94.text	03AF61160E04FFA0FF45FEC6FE1DFE94.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa postmediana Sassi 2025	<div><p>Mylassa postmediana sp. nov.</p><p>urn:lsid:zoobank.org:act: AE95164B-44BC-4604-AD35-D1E811516B59</p><p>(Figs. 10a–c; 14b; 17g –i; 27c)</p><p>Types. HOLOTYPE: CHILE: Valparaíso: (BYU), ♂, body and detached abdomen glued on same card, median lobe of aedeagus glued on different card, // “CHILE, P. Valparaíso, Algarrobo, 31-XII-1967, C.W. &amp; L.B. O’Brien ” [white label, handwritten] // “ Mylassa postmediana sp. nov . HOLOTYPUS D. Sassi des.” [red label, printed] //. PARATYPES: (BYU &amp; DSPC), 3 ♂, same data of the holotype, // “ Mylassa postmediana sp. nov . PARATYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality. Algarrobo (Provincia de San Antonio, Región de Valparaíso, Chile) .</p><p>Etymology. The species name postmediana derives from the Latin post (‘behind’) and medianus (‘middle’), referring to the yellow elytral pattern, which is limited to the posterior half of the elytra.</p><p>Distribution. Chile (Valparaíso).</p><p>Biological notes. No data available.</p><p>Diagnosis. Among small-sized species characterized by black elytral coloration with two (lateral-median and apical) yellow spots (including Mylassa flavolimbata, M. longicornis, and M. daccordii, besides the present one), M. postmediana is easily distinguished by shape of the median elytral spot, which is elongated, slender, and distinctly transverse. Additionally, the prominently bulging pronotum, very fine and almost obliterated elytral punctation, and apparent, dense pilosity on elytron are highly characteristic features of M. postmediana, which are almost absent in other species listed above.</p><p>Description of male. Habitus in Figs. 10a–b (PT). BL = 3.1–3.3 mm, BW = 1.9–2.0 mm, PL = 1.2–1.3 mm, PW = 1.8–1.9 mm. Interocular distance 18.2–19.4 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface quite shiny, almost bare, covered with fine, regularly distributed punctation; mid-cranial and frontoclypeal sutures not clearly detectable; sometimes a linear or oval impression at middle of frons. Eyes small, scarcely bulging, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, barely visible. Antennae uniformly dark brown, almost reaching elytral clivus when bent backwards, antennomeres 4–10 short, slightly flattened, scarcely different from each other in length and shape.</p><p>Pronotum totally black, regularly convex, bulging. Lateral margins narrow, not visible from above, mildly and regularly arched, maximum width about at basal margin. Posterolateral impressions weak, short, scarcely departing from posterior margin towards sides. Pronotal surface covered with close, regularly distributed, very fine punctation and sparse, recumbent, short setae, thicker along lateral and posterior margins. Posterior lobe large, slightly convex with apex truncated in straight line.</p><p>Scutellum black, triangular, pointed, not raised, bare, rather coarsely punctured.</p><p>Elytron black with crosswise, linear yellow band just behind middle, extended from lateral margin up to about first row of punctures (i.e. not reaching suture); further crescent, yellow spot at apex. Elytral outline cylindrical, regularly convex, with sides parallel, i.e. not convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytral surface, covered with scattered, short, whitish, recumbent setae and very fine punctation, arranged in regular rows, barely perceptible as surface covered by fine but thick roughness. Epipleura narrow, with weakly concave, minutely punctured surface.</p><p>Pygidium black, matt, covered by fine punctures and short, appressed setae.</p><p>Ventral surface black, matt, finely and densely punctured, with short, appressed setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, short, roughly squared; sides with sharp denticle at middle; surface with scattered punctured and scarce, short setae; posterior margin almost straight.</p><p>Legs completely black. Anterior tibiae expanded and bent inwards at apex, with small, sharp subapical denticle on inner rim. Apex of median tibiae enlarged, with robust, blunt, subapical tooth-like process on inner side.</p><p>Fifth abdominal ventrite devoid of perceptible median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 17g –i) short, squat. Ventral surface strongly concave with short, sharp median carina. Shaft terminated with rounded apical edge.Setose depressions slender, shallow, scarcely delimited. Setigerous lamellae large, triangular with long apical setae.</p><p>Female. Unknown.</p></div>	https://treatment.plazi.org/id/03AF61160E04FFA0FF45FEC6FE1DFE94	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E02FFA1FF45FEB1FEAAFAA6.text	03AF61160E02FFA1FF45FEB1FEAAFAA6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa longicornis Sassi 2025	<div><p>Mylassa longicornis sp. nov.</p><p>urn:lsid:zoobank.org:act: A4F4A450-BF1E-4694-906E-7C922FBDC083</p><p>(Figs. 10d–f; 14c; 18a–c; 25d; 27b)</p><p>Types. HOLOTYPE: CHILE: Valparaíso: (NMPC), ♂, body and detached abdomen glued on same card, median lobe glued on different card, // “ CHILE: V. Paraiso Region PN La Campana, Sector Granizo Sendero El Andista, above 2 do Aquada 32°58.2[ʹ] S 71° 7.5 [ʹ] W; 900 m; 22.xi.2013; Fikáček, Kment &amp; Vondráček CH06” [white label, printed] // “evergreen forest and deciduous forest on slopes, sweeping + beating of trees ( Escallonia, Retamilla [sic] ephedra, Nothofagus macrocarpa, Kageneckia, etc.” [white label, printed] // “ Mylassa longicornis sp. nov. HOLOTYPUS D. Sassi des.” [red label, printed] //. PARATYPES (30): CHILE: Valparaíso: 3 ♂, (NMPC &amp; DSPC), same data of the holotype. Araucanía: (BMNH), 1♂, // “Chile: El Radal. L.E.Pena, 28.30. xi.1957. B.M. 1964-582. 1100m.” white label, partly handwritten] //. Maule: (MSNG), 1♀, // “ CHILE CE., reg. VII Curico E of Potrero Grande 10.12.2003 Leg. M. Snížek ” [white label, printed] // “ Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] //. Santiago: (IAPC), 1♀, // “ CHILE, LaViluma, SE Melipilla 15/ 17.XII.1987 ” [white label, printed] //; (IAPC), 16♂ 8♀, // “ CHILE, Rancagua Q.la Goyana s.e. Aculeo 1800m xi.1981 ” [white label, printed]. All Paratypes also labelled: // “ Mylassa longicornis sp. nov. PARATYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality. Parque Nacional La Campana (Región de Valparaíso, Chile) .</p><p>Etymology. The species name derives from the Latin longus (‘long’) and cornu (‘horn’ or ‘antenna’), referring to the particularly long antennae of the male.</p><p>Distribution. Chile (Araucanía, Maule, Santiago, Valparaíso). The Región Metropolitana de Santiago is reported in an observation on iNaturalist.</p><p>Biological notes. According to label data, a few specimens examined in this study were collected by beating various tree or shrub species. Noteworthy among these are Retanilla ephedra (Vent.) Brongn. ( Rhamnaceae) and Nothofagus antarctica (Forst) Oerst. ( Nothofagaceae), as also reported for other species of genus Mylassa .</p><p>Diagnosis. It differs from M. flavolimbata in the different shape of the elytral median yellow spots, which is slightly transverse (longitudinally arranged in M. flavolimbata). Besides, in M. longicornis the ventral surface of the aedeagal median lobe is more convex, the setigerous lamellae are larger and triangular (elliptical in M. flavolimbata) and bear longer setae. In the single female studied, the light elytral spots are slightly larger, and the pattern closely resembles that of many females of M. rubronotata . However, in the latter, the colour tends to be ochreous, while it is distinctly yellow in M. longicornis . Furthermore, and more significantly, in females of M. rubronotata, the punctation on both the pronotum and elytra is finer, and the antennae are decidedly shorter, and folded backward, barely reaching the midpoint of the elytra. In M. longicornis, when folded backward, the antennae reach the elytral apex.</p><p>Description of male. Habitus in Figs. 10d–f (PT). BL = 2.7–2.8 mm, BW = 1.7 mm, PL = 1.1–1.2 mm, PW = 1.6 mm. Interocular distance 17.9–18.5 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface covered with well-impressed, regularly distributed punctation and scattered short whitish setae; mid-cranial and frontoclypeal sutures not clearly detectable. Eyes large, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, perceptible only along upper ocular edge. Antennae long, reaching elytral clivus when bent backwards, antennomeres black, sometimes with lighter patches, especially on basal segments, minutely setose, slender, 5–10 slightly flattened, 4–11 scarcely differing in length.</p><p>Pronotum totally black, convex, slightly transverse. Lateral margins narrow, not visible from above, almost straight, weakly converging towards anterior margin so that overall outline almost square, with maximum width at about basal margin. Posterolateral impressions long, obliquely departing from posterior margin towards sides, well impressed so that central part of disc looking fairly bulging. Pronotal surface almost bare, covered with close, regularly distributed, coarse but shallowly impressed punctation. Posterior lobe slender, slightly convex with apex truncated in straight line.</p><p>Scutellum black, bare, triangular, sometimes apex separated by transversal furrow, not raised, bare, finely punctured.</p><p>Elytron black with large, elliptical, transversally arranged yellow spot just before middle, almost reaching humeral callus, extended from second rows of punctures to lateral margin; further yellow spot at apex. Elytral outline cylindrical, regularly convex, with sides parallel, i.e. not convergent toward apex. Lateral margins narrow, partly visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytral surface almost bare, slightly rugulose, with punctures arranged in well-impressed, almost regular rows. Epipleura narrow, with weakly concave, slightly wrinkled surface.</p><p>Pygidium black, covered by fine punctures and scattered, short, appressed setae.</p><p>Ventral surface black, matt, finely and densely punctured, with short, appressed setae, except scarcely setose, shiny posterior part of hypomera. Prosternal process wide, short and transverse, transversally depressed at centre; sides with sharp, thorn-shaped denticle behind middle; posterior margin raised at middle in sharp, laterally flattened process; surface minutely punctured, with sparse, long setae.</p><p>Legs completely black. Anterior tibiae mildly curved inward and fairly expanded towards apex. Median tibiae slightly expanded as well at distal end. Both anterior and median devoid of apical or subapical tooth-like process.</p><p>Fifth abdominal ventrite strongly concave in lateral view, devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 18a–c) short, squat. Ventral surface concave with smooth surface. Shaft terminated with blunt triangular apical edge. Setose depressions slender, shallow, scarcely delimited, with few sort setae and sparse very fine punctures. Setose lamellae small, roughly triangular, bearing short setae lined in two rows.</p><p>Female. Habitus in Figs. 10g –h (HT). BL = 3.1 mm, BW = 1.9 mm, PL = 1.3 mm, PW = 1.8 mm. Interocular distance 22.6 % of BL.</p><p>Females differ in larger size, stouter outline, slightly larger ocular distance, anterior tibiae not modified and shorter antennae.</p><p>Fifth abdominal ventrite in females with shallow rounded pit with a flat, bald, scarcely punctured base.</p><p>Vasculum of spermatheca (Fig. 25d) slender, hook-shaped, with proximal and distal lobes not swollen, the latter slightly shorter, mildly tapered into pointed apex. Ampulla lengthened, cylindrical. Duct insertion and sperm gland insertion fully separate, the latter sitting at proximal end of ampulla. Duct fine, short, not coiled, with single turn near vasculum. Proximal section embedded in thickened, rigid sleeve.</p><p>Remarks. A picture of a living specimen of this species is available on iNaturalist (https://www.inaturalist.org/ observations/49140499) reported from Alhué, (Región Metropolitana de Santiago, Chile) at an elevation of about 2000 m a.s.l.</p></div>	https://treatment.plazi.org/id/03AF61160E02FFA1FF45FEB1FEAAFAA6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E03FFA2FF45FA5FFDA3FA48.text	03AF61160E03FFA2FF45FA5FFDA3FA48.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa ferruginea Sassi 2025	<div><p>Mylassa ferruginea sp. nov.</p><p>urn:lsid:zoobank.org:act: BAC5C0F4-E8BC-4338-9EF7-2810AC1068A8</p><p>(Figs. 7d–f; 14d; 25e; 27b)</p><p>Types. HOLOTYPE: PARAGUAY: (MNHUB), ♀, body and detached abdomen glued on same card, genitalia glued on different card, // “19 sept. Baccharis tridentata” [white label, handwritten] // “ Paraguay leg. C. Fiebrig ” [white label, printed] // “ Mylassa ferruginea sp. nov . HOLOTYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality. “ Paraguay ”</p><p>Etymology. The species name ferruginea derives from the Latin ferrugineus (‘rust-colored’), referring to the predominantly reddish hue of the dorsal colour pattern.</p><p>Distribution. Paraguay (no further locality data available).</p><p>Biological notes. No data available.</p><p>Diagnosis. This species is most easily distinguishable by its dorsal, rusty red coloration extending to the pronotum and the entire surface of the legs. The highly convex shape of the pronotum, the relatively large size, and the significantly dense dorsal covering of whitish setae somewhat resemble M. crassicollis . However, in M. ferruginea, the pronotal surface is distinctly matte (shiny in M. crassicollis). Additionally, elytral punctures are more pronounced, and setae on elytral surface appear longer and semi-erect (appressed in M. crassicollis).</p><p>Description of female (male unknown). Habitus in Figs. 7d–e (HT). BL = 4.3 mm, BW = 2.7 mm, PL = 1.7 mm, PW = 2.3 mm. Interocular distance 23.3 % of BL.</p><p>Head brownish, labrum yellow. Vertex and frontoclypeal surface impunctate but covered by tiny rugosity and long, thick, appressed white setae hiding almost whole surface. Mid-cranial and frontoclypeal sutures not clearly detectable. Eyes small, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, perceptible only along upper ocular edge. Antennae missing in the only available specimen.</p><p>Pronotum rusty red with large, rhomboid, blackish patch at middle of disc. Such patch longitudinally expanded backwards to reach the posterior lobe, blackish as well. Pronotal outline strongly bulging, with lateral margins narrow, not visible from above, almost straight, fairly converging towards anterior margin so that overall outline vaguely trapezoidal, maximum width at basal margin. Posterolateral impressions long, obliquely departing from posterior margin towards sides, well impressed so that central part of disc looking particularly bulging. Pronotal surface matt, impunctate but covered with close network of tiny rugosity; along margins almost hidden by long, thick, appressed, white setae; on central part of disc setae look thinner and reddish, not hiding the underlying surface. Posterior lobe rather large, slightly convex with apex truncated in straight line.</p><p>Scutellum black, bare, triangular, not raised, densely and finely punctured and setose.</p><p>Elytron rusty red, suture and posterior part of lateral margin black; humeral callus black as well. Further longitudinal, slender, blackish stripe at middle of disc. Elytral outline cylindrical, regularly convex, with sides almost parallel, i.e. not clearly convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytron covered with long, appressed, whitish setae, rather irregularly arranged, being less dense in proximity of scutellar area and clivus. Elytral surface with rows of punctures almost obliterated, only partly detectable, covered with network of tiny rugosity not as thick as on pronotum, so that surface looks slightly shinier.</p><p>Epipleura narrow, with weakly concave surface covered with dense whitish pilosity.</p><p>Pygidium and ventral parts hidden by coarse, appressed, white pilosity, except almost bare and shiny posterior part of hypomera and mesoepimera. Prosternal process wide, short; posterior angles broadened, bluntly triangular; posterior margin rounded; surface equally covered with coarse pilosity.</p><p>Legs completely rusty red, covered with thick, whitish pilosity.</p><p>Fifth abdominal ventrite with rather deep, rounded pit with flat, almost bald, coarsely but shallowly punctured base.</p><p>Lobes of vasculum of spermatheca (Fig. 25e) approximately of same length, swollen, in particular proximal one. Distal one straight, with tapered apex. Ampulla well pigmented, lengthened, tapered apically, where sperm gland insertion starts with button-like blackish swelling. Duct insertion fully separate from sperm gland insertion. Duct fine, distal section loosely coiled up; proximal section and insertion on bursa copulatrix missing.</p><p>Remarks. Morphologically, the species appears well distinguished from other members of Mylassa .Additionally, the structure of the spermatheca is unusual, with a swollen vasculum. Unfortunately, the proximal portion of the ductus was lost during preparation.</p></div>	https://treatment.plazi.org/id/03AF61160E03FFA2FF45FA5FFDA3FA48	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
03AF61160E00FFAAFF45F9CDFA18FA25.text	03AF61160E00FFAAFF45F9CDFA18FA25.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Mylassa mirabilis Sassi 2025	<div><p>Mylassa mirabilis sp. nov.</p><p>urn:lsid:zoobank.org:act: 9276AB80-8764-4093-AF13-ED6686769B11</p><p>(Fig. 11; Figs. 14e; 18d–f; 22a–c; 25f; 27c)</p><p>Types. HOLOTYPE: CHILE: Ñuble: (MSNG), ♂, body and detached abdomen glued on same card, aedeagal median lobe glued on different card, // “ CHILE CW., reg. VIII Chilan [sic!], El Carmen Los Castaños 21.11.2003 Leg. M. Snížek ” [white label, printed] // “ Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] // “ Mylassa mirabilis sp. nov . HOLOTYPUS D. Sassi des.” [red label, printed] //. PARATYPES (8): CHILE: Ñuble: (MSNG), 2♂ 3♀, same data of the holotype. Maule: (MSNG), 2♀, // “ CHILE CE., reg. VII Talca, San Clemente Carralones [sic!] 25.XI.2003 Leg. M. Snížek ” [white label, printed] // “ Museo Genova ex coll. M. Snizek acquisto 2010” [white label, printed] //. (DSPC), 1♀, // “ CHILE I.98 Alto Vilches Talca Prov. ” [white label, printed] //. All paratypes also labelled: // “ Mylassa mirabilis sp. nov . PARATYPUS D. Sassi des.” [red label, printed] //.</p><p>Type locality. El Carmen, Chillán ( Región de Ñuble, Chile) .</p><p>Etymology. The species name mirabilis derives from the Latin mirabilis (‘remarkable’ or ‘unusual’), referring to its somewhat peculiar yet distinctive appearance.</p><p>Distribution. Chile (Maule, Ñuble).</p><p>Biological notes. No data available.</p><p>Diagnosis. For the elytral yellow pattern, Mylassa mirabilis may resemble M. postmediana: in both species, the light elytral median spot is distinctly transverse. However, in M. postmediana, this spot is more sharply defined against the background, slightly raised, and of a more pronounced yellow hue. In M. mirabilis, this spot has a more uncertain, winding pattern and is less clearly delimited against the background, with a redder colour tone. Furthermore, in M. postmediana, pronotum is more convex, and punctation is much finer. Additionally, in the latter species, setae are denser, finer, and more appressed. In M. mirabilis, setae are instead much longer and mostly erect or semi-erect. Besides, M. mirabilis differs from M. crassicollis in pronotal shape, which is less bulging and more tapered anteriorly. Aditionally, the pronotal surface is decidedly matt (shiny in M. crassicollis). Moreover, elytral punctures are more impressed, and setae on elytral surface look longer and semi erect (appressed in M. crassicollis).</p><p>Description of male. Habitus in Fig. 11a–b (HT). BL = 3.0– 3.3 mm, BW = 1.9 mm, PL = 1.3–1.5 mm, PW = 1.7–1.8 mm. Interocular distance 15.2–16.7 % of BL.</p><p>Head totally black. Vertex and frontoclypeal surface covered with well-impressed, fine punctation, closer on vertex and upper part of frons, more scattered on rest of surface, and long, rather thick, whitish setae; mid-cranial and frontoclypeal sutures not clearly detectable. Eyes large, only shallowly notched on inner margin with upper lobes well separated from each other. Ocular lines scarcely impressed, perceptible only along upper ocular edge. Antennae reaching elytral half when bent backwards, antennomeres robust, brown, basal antennomeres usually lighter; antennomeres 3–5 subcylindrical; 6–10 slightly flattened; 4–11 scarcely differing in length.</p><p>Pronotum totally black, convex, slightly transverse. Lateral margins narrow, not visible from above, faintly angulate behind midline, then almost straight, fairly converging towards anterior margin so that overall outline vaguely pentagonal, with maximum width just before basal margin. Posterolateral impressions long, obliquely departing from posterior margin towards sides, well impressed so that central part of disc looking fairly bulging. Pronotal surface matt, covered with close, regularly distributed, coarse but shallowly impressed punctation and long, erect, partly whitish, partly blackish setae. Posterior lobe large, slightly convex with apex truncated in straight line.</p><p>Scutellum black, bare, triangular, not raised, densely and finely punctured and setose.</p><p>Elytron black with large, wavy transversal reddish band at about middle. Such band, broader towards side, starting from suture and reaching lateral margin, where merging with slender reddish patch running along lateral edge from humeral callus to posterior clivus. Usually, second transversal reddish band along basal margin, ranging from inner border of humeral callus to suture, then extending along suture to merge with median band. Sometimes this basal band reduced or missing. Further crescent-like reddish spot on apex. Elytral outline cylindrical, regularly convex, with sides parallel, i.e. not convergent toward apex. Lateral margins narrow, not visible from above. Scutellar area not raised. Humeral callus scarcely prominent, not punctured. Elytron covered with long, erect, whitish setae, thicker behind middle and on reddish pattern; surface slightly rugulose, with punctures arranged in well-impressed, almost regular rows. Epipleura narrow, with weakly concave, slightly wrinkled surface covered with dense whitish pilosity.</p><p>Pygidium black, matt, covered by fine punctures and dense, long, appressed setae.</p><p>Ventral surface black, matt, finely and densely punctured, with dense, long, appressed setae, except almost bare and shiny posterior part of hypomera and mesoepimera. Prosternal process wide, short and transverse; sides concave, with rather small, raised denticle at middle; surface minutely punctured, with dense, long, appressed setae; posterior margin rounded.</p><p>Legs completely black. Anterior and median legs with no sexual modifications.</p><p>Fifth abdominal ventrite devoid of median depression along posterior margins. Posterior margin of fifth abdominal ventrite straight.</p><p>Median lobe of aedeagus (Figs. 18d–f) short, squat, dorso-ventrally flattened. Ventral surface strongly concave with no clues of median carina. Shaft terminated with blunt, short triangular apex. Setose depressions slender, shallow, scarcely delimited, extended along sides up to middle of shaft. Setigerous lamellae shaped like rectangular trapezoid, i.e., squared at one end and tapering towards aedeagal apex, bearing single line of setae along distal edge.</p><p>Female. Habitus in Fig. 11f–g. BL = 3.3–3.7 mm, BW = 2.1–2.2 mm, PL = 1.5–1.6 mm, PW = 1.8–1.9 mm. Interocular distance 18.2–18.9 % of BL.</p><p>Females differ in slightly stouter outline and larger interocular distance. Additionally, antennae are shorter and thinner, and first tarsomeres of anterior legs slightly slenderer.</p><p>Fifth abdominal ventrite with shallow pit with a flat, shiny, and shallowly punctured base.</p><p>Vasculum of spermatheca (Fig. 25f) hook-shaped with slender lobes. Distal lobe is longer than proximal one, mildly curved with sharp apex. Ampulla long, very slender, almost threadlike, slightly broadened at apex. Duct insertion fully separate from sperm gland insertion; the latter is sitting on apex of ampulla. Duct fine, long, not coiled, loosely meandering; insertion on bursa copulatrix short, fairly thickened without forming long rigid sleeve.</p></div>	https://treatment.plazi.org/id/03AF61160E00FFAAFF45F9CDFA18FA25	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sassi, Davide	Sassi, Davide (2025): Taxonomic revision of the South American genus Mylassa Stål, 1867 (Coleoptera: Chrysomelidae: Cryptocephalinae) with the description of eight new species. Zootaxa 5683 (3): 301-359, DOI: 10.11646/zootaxa.5683.3.1, URL: https://doi.org/10.11646/zootaxa.5683.3.1
