Oligocorynus flavomaculatus ( Mader, 1943 ) Lopes & Gasca-Álvarez & Skelley, 2020

Lopes, Peterson Lásaro, Gasca-Álvarez, Héctor Jaime & Skelley, Paul E., 2020, Redescriptions, new synonymy, new combination and new records of Bacis Dejean, 1836 and Oligocorynus Dejean, 1876 (Coleoptera: Erotylidae: Erotylinae) for Colombia, Zootaxa 4809 (2), pp. 349-362 : 355-360

publication ID

https://doi.org/ 10.11646/zootaxa.4809.2.6

publication LSID

lsid:zoobank.org:pub:ECB2E640-6102-4230-8CF3-730AD1038AC4

DOI

https://doi.org/10.5281/zenodo.4323975

persistent identifier

https://treatment.plazi.org/id/F029879C-C22B-1146-FF4C-F999FAEC39ED

treatment provided by

Plazi

scientific name

Oligocorynus flavomaculatus ( Mader, 1943 )
status

comb. nov.

Oligocorynus flavomaculatus ( Mader, 1943) , new combination

( Figs. 30–56 View FIGURES 30–37 View FIGURES 38–45 View FIGURES 46–52 View FIGURES 53–56 )

Phricobacis flavomaculatus Mader 1943: 114 ; Mader 1951: 203, key; Alvarenga 1994: 119, catalog. Holotype: Peru, Chanchamayo (NHMW, not examined).

Redescription. Length 7 mm, thorax/abdomen R=1.4. Body moderately oval, sides subparallel, moderately convex. Head dark orange, antennae with antennomere I orange and antennomeres II to XI black, clypeus dark orange, pronotum orange, mesoventrite, mesanepisterna, mesepimera and metaventrite dark orange, coxae and femora dark orange, tibiae and tarsi black, elytra black with three orange maculae, epipleura black, ventrites dark orange ( Figs. 30–33 View FIGURES 30–37 ).

Head (R=0.7): ocular striae absent, eyes finely faceted, interocular distance ~5/8 of head width, sub-ocular pore evident, post-mandibular lobes conspicuous with a setal tuft ( Fig. 34 View FIGURES 30–37 ). Stridulatory organs at base of head absent in both sexes. Antennae (R=12.1): club with three flattened antennomeres, antennomere VIII and XI elongate, antennomeres more pubescent towards club ( Fig. 35 View FIGURES 30–37 ). Clypeus (R=0.5): apex emarginate, lateral margins curved, central region elevated, surface with fine punctures ( Fig. 34 View FIGURES 30–37 ). Labrum (R=0.5): sub-elliptical, with semicircular anterior elevation, distal margin truncate, anterior angles rounded, absence of membranous cover at proximal half ( Fig. 36 View FIGURES 30–37 ). Epipharynx with setae in median region and at anterior margin, median region covered with microtrichiae, tormae with anterior projection reaching the basal quarter of labrum, posterior projection of tormae almost as long as the anterior projection ( Fig. 37 View FIGURES 30–37 , arrow). Mandibles slightly asymmetrical, with three incisors, distal incisors narrower and sclerotized, membranous lobe covered with microtrichiae on molar region, one carina at dorsal region, ventral cavity with internal incisor margin curved, sinuate in left mandible, left mandible with proximal incisor smaller and attached to the middle incisor as a lobe ( Figs. 38–41 View FIGURES 38–45 ). Maxillae (R=3.3): lacinia with two apical curved teeth, with long setae denser distally, basal palpomere elongate, palpomeres II–III as wide as long, palpomere IV very long, securiform, galea (R=1.3) lobed, slightly projected, with moderately long setae denser distally ( Figs. 42–43 View FIGURES 38–45 ). Hypopharynx with two arms extending to anterior region of mentum ( Fig. 44 View FIGURES 38–45 , arrow). Labium (R=1.6): ligula long (~3/4 width of mentum), fused at middle, basal sclerite absent, outer angles with moderate projection, setae denser on last palpomeres, basal palpomere with moderately curved base, palpomere III slightly securiform, asymmetrical, inner angle of distal margin slightly narrow, mentum with medial region without definite shape ( Fig. 45 View FIGURES 38–45 ).

Thorax: pronotum (R=0.4) flattened, lateral region of posterior margin without depression, surface with strong punctures, prosternum with moderately long setae, basal margin of prosternum truncate, prosternal lines absent, procoxal lines absent. Scutellar shield (R=0.7) triangular. Metaventrite (R=0.4): mesocoxal lines absent, supracoxal lines conspicuous. Legs: surface of femora with sparse punctures, tibiae with dense setae and slightly expanded distally, metathoracic legs with femora as wide as the prothoracic legs. Elytra (R=2.2): subtriangular, base sinuate, surface with moderate punctures (φ~ 0.1 mm), striae and inter-striae indistinct. Metathoracic wings (R=2.3): with one axillar vein, veins AA 3+4 reaching CuA 3+4, veins MP 3+4 reaching MP 1+2, vein cua1-mp4 complete, vein r4 incomplete, medial spot conspicuous ( Fig. 46 View FIGURES 46–52 ).

Abdomen: surface fine and sparse, with few short setae, ventrite 1 with anterior elevation. Male genital segments and genitalia: tergite VIII (R=0.4) subtriangular, base curved, setae denser distally ( Fig. 47 View FIGURES 46–52 ), sternite VIII (R=0.3) transverse, distal margin emarginate, setae denser distally ( Fig. 48 View FIGURES 46–52 ), tergite X (R=0.7) U-shaped, apex slightly rounded, setae denser distally ( Fig. 49 View FIGURES 46–52 ), laterotergite IX (R=1.6) elongate, asymmetrical, lateral lobes sub trapezoidal; sternite IX setae denser distally ( Fig. 50 View FIGURES 46–52 ). Aedeagus: tegmen elongate at proximal third, dorsal longitudinal line sclerotized, with dorsal subapical spot, tegmen arm long, with a sclerotized ventral line, lateral lobe width ~1/8 of tegmen length, setae denser distally, distal region of medial lobe with a short and cylindrical projection, internal sac short ( Fig. 51 View FIGURES 46–52 ); head of flagellum falciform, elongate ( Fig. 52 View FIGURES 46–52 , MAAEIS). Female genital segments and genitalia: tergite VIII (R=0.5) transverse, setae denser distally ( Fig. 53 View FIGURES 53–56 ), sternite VIII (R=0.6) transverse, setae dens- er distally, median strut approximately four times longer than base ( Fig. 54 View FIGURES 53–56 ), tergite IX and sternite IX indistinct, membranous, surface with microtrichiae uniformly distributed. Ovipositor: proctiger lobe long, covering the vulval lobe, subvulval lobe as wide as the basal segments of the gonocoxites, gonocoxites ~1/2 of ovipositor length with apex truncated and angulate at inner apex, gonostyli with dense setae ( Figs. 55–56 View FIGURES 53–56 , arrow). Spermatheca oval.

Intraspecific variation. The sizes of the elytral maculae are variable. The elytral base can be straight.

Diagnosis. Oligocorynus flavomaculatus is distinguished from other Oligocorynus species by its dorsal coloration, having the elytral surface black with three orange spots and the pronotum orange, and clypeus emarginate.

Etymology. The genus name is derived from the Greek oligo, “few, scanty” and coryno, “club, mace”; the specific epithet is derived from the Latin flavus, “yellow” and maculatus, “with spots”, referring to the antennae and the elytral coloration.

Material examined. Colombia—Boyacá : Muzo (5°32’7’’N, 74°10’40’’W), ex-Coll. Alvarenga, M. Alvarenga det. [ Oligocorynus “sp.n.2”], homeotype, †483 ( MNRJ) GoogleMaps . Brasil—Acre : Tarauacá (8°7’59’’S, 70°46’0’’W), ex-Coll. M. Viana, ex-Coll. J.E. Barriga Chile, P. Skelley det., ♂, #022163, #077131, †1 ( FSCA) GoogleMaps . Rondônia : Ouro Preto do Oeste , sítio Deus é Amor (1°42’35’’S, 62°15’0’’W), M.F. Torres col. (26.iii.1985), P. Skelley det. 1995 [ Zonarius near rugipunctatus], ♂, †83 ( MPEG) GoogleMaps ; Fazenda Rancho Grande , 62 km SO Ariquemes (10°18’0’’S, 62°37’48’’W), C.W. & L.B. O’Brien col. (16.x.1993), P. Skelley det., ♂, †2 ( FSCA) GoogleMaps . Peru—P. Skelley det. 1994 [ Zonarius near rugipunctatus], ♀, †344 ( HNHM) .

Geographical distribution. Colombia (Boyacá) (new country record), Brazil (Acre, Rondônia), Peru (Chan- chamayo).

Remarks. According to the unpublished thesis of Lopes (2009), Phricobacis flavomaculatus and other species in the genus Phricobacis are more related to some species of the genus Oligocorynus . A phylogenetic analysis of the genus Oligocorynus should include a study of these species. For now, based on Lopes (2009), we transfer P. flavomaculatus to Oligocorynus , becoming Oligocorynus flavomaculatus (Mader) , new combination.

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

MPEG

Museu Paraense Emilio Goeldi

HNHM

Hungarian Natural History Museum (Termeszettudomanyi Muzeum)

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Erotylidae

Genus

Oligocorynus

Loc

Oligocorynus flavomaculatus ( Mader, 1943 )

Lopes, Peterson Lásaro, Gasca-Álvarez, Héctor Jaime & Skelley, Paul E. 2020
2020
Loc

Phricobacis flavomaculatus

Alvarenga, M. 1994: 119
Mader, L. 1951: 203
Mader, L. 1943: 114
1943
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