Styloleptus charynae, Santos-Silva & Monné, 2023

Santos-Silva, Antonio & Monné, Miguel A., 2023, The incredible biodiversity of American Lamiinae (Coleoptera, Cerambycidae) description of four new species, synonymy, and taxonomical notes, Zootaxa 5244 (3), pp. 244-260 : 248-250

Styloleptus charynae sp. nov.

( Figs 10–13 )

Description. Holotype female. Head capsule black; anteclypeus dark brown close to postclypeus, dark yellowish brown close to labrum; labrum blackish close to anteclypeus, dark reddish brown on remaining surface; scape reddish brown with irregular black maculae interspersed; pedicel reddish brown about basal half, dark brown on remaining surface; antennomere III dark brownish orange with irregular dark-brown maculae interspersed, and posterior third dark brown basally, dark reddish brown centrally, black on remaining surface; antennomere IV brownish orange on basal third, with a few irregular brown maculae interspersed, with wide, irregular brown ring about middle, and posterior quarter brownish orange except its dark brown apex; antennomeres V–X brownish orange except dark brown apical region, dark brown area gradually longer toward X; antennomere XI brown. Pronotum brown, except large, Y-shaped dark brown macula centrally, partially blackish anteriorly, from anterior to posterior margin, and black macula on each side close to posterolateral angles, this macula reaching superior region of sides of prothorax. Remaining surface of sides of prothorax brown. Prosternum and prosternal process dark brown with irregular dark reddish-brown areas interspersed. Ventral surface of meso- and metathorax dark brown with irregular, both brown and dark reddish-brown areas interspersed. Scutellum blackish. Elytra with wide brownish-orange band on sides of anterior quarter, involving humerus, not reaching epipleural margin; with wide orangish-brown band on anterior quarter, on sides of scutellum and near suture; with wide, oblique dark brownish orange band, reaching suture and epipleural margin, from about middle to posterior quarter; fulvous on posterior quarter, except irregular dark brown maculae interspersed; remaining surface black. Femora orangish brown on peduncle and posterior half of club, blackish on remaining surface; tibiae orangish on basal third, brown on remaining basal half, reddish brown from middle to posterior third, blackish on posterior third of pro- and mesotibiae, dark brown on posterior third of metatibiae. Pro- and mesotarsi mostly blackish; metatarsi mostly dark brown. Ventrites 1–4 orangish brown with irregular blackish areas interspersed, except yellowish-brown apex of ventrites 2–4; ventrite 5 dark brown on basal half, orangish brown on posterior half.

Head. Frons densely, finely punctate; with abundant whitish pubescence not obscuring integument, except glabrous median groove, glabrous area close to eyes, superior area close to median groove with abundant, thick pale-yellow pubescence, and yellowish pubescence not obscuring integument superiorly, between pale-yellow pubescence and whitish pubescence close to eyes. Frontal area between eyes and antennal tubercles with sparse, thick, decumbent yellowish-white setae. Area between antennal tubercles densely, finely punctate; with somewhat abundant, thick pubescence centrally, pubescence pale-yellow toward frons, yellowish brown toward eyes, except glabrous median groove, and abundant dark-brown pubescence not obscuring integument laterally. Area between upper eye lobes with dense yellowish-brown pubescence; remaining surface of vertex with somewhat sparse dark brown pubescence close to yellowish-brown pubescence, glabrous close to prothorax. Area behind upper eye lobes with dense yellowish-brown pubescence close to eye, pubescence sparse close to prothorax. Area behind lower eye lobes with abundant yellowish-brown pubescence close to eyes, pubescence slightly sparser centrally and inferiorly, glabrous close to prothorax. Genae somewhat finely rugose-punctate, except smooth apex; with sparse, decumbent yellowish-white setae, except glabrous apex. Antennal tubercles with abundant dark brown pubescence not obscuring integument, except posterior region with pale-yellow pubescence interspersed on basal region. Wide central area of postclypeus with somewhat abundant, bristly whitish pubescence not obscuring integument, and a few long, erect yellowish-brown setae interspersed. Sides of postclypeus glabrous. Labrum with sparse brown pubescence close to anteclypeus, glabrous anteriorly, except fringe of yellowish-brown setae on anterior margin; posterior region with long, erect dark brown setae interspersed. Distance between upper eye lobes 0.19 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.44 times distance between outer margins of eyes. Antennae 2.0 times elytral length, reaching elytral apex near apex of antennomere VI. Scape with somewhat abundant yellowish-white pubescence ventrally not obscuring integument; dorsal surface and sides with two wide, transverse yellowish-white pubescent bands, one before middle, another between middle and posterior apical sixth; remaining surface with brownish pubescence not obscuring integument, posterior sixth with yellowish decumbent setae interspersed. Pedicel with somewhat abundant yellowish-white pubescence on most of basal half and dark brown pubescence on apical half. Antennomere III with abundant yellowish-white pubescence about basal half, with irregular areas with sparse brown pubescence interspersed; posterior half with yellowish-white pubescent macula on its base, except on ventral surface, irregular whitish pubescence macula on middle of its dorsal surface, and remaining surface with blackish pubescence. Antennomere IV mostly with abundant yellowish-white pubescence not obscuring integument, and irregular brown ring on basal third and about middle, and dark brown pubescence on apex. Antennomere V with abundant whitish pubescence partially obscuring integument, except base with sparse brownish-yellow pubescence, middle with sparse brownish-yellow pubescence dorsally and laterally, and apical quarter with abundant dark-brown pubescence. Antennomere VI with sparse brownish-yellow pubescence basally, abundant whitish pubescence on remaining basal 3/4, and brown pubescence on apical quarter. Antennomere VII with sparse brownish-yellow pubescence basally, abundant whitish pubescence on remaining basal 2/3 and brown pubescence with short white setae interspersed on apical third. Antennomeres VIII–X with sparse brownish-yellow pubescence basally, abundant whitish pubescence on remaining basal half and brown pubescence with short white setae interspersed on apical half.Antennomere XI with abundant brown pubescence partially obscuring integument, with short whitish setae interspersed, and somewhat short whitish setae directed backward apically. Antennal formula based on length of antennomere III: scape = 0.87; pedicel = 0.17; IV = 0.87; V = 0.65; VI = 0.54; VII = 0.50; VIII = 0.48; IX = 0.41; X = 0.41; XI = 0.37.

Thorax. Prothorax wider than long; sides divergent from anterolateral angles to near posterior third, where there is a rounded protuberance, and subparallel-sided from the protuberance toward posterolateral angles. Pronotum with large gibbosity on each side, from anterior fifth to about posterior quarter; with semicircular gibbosity on center of anterior third, surrounding central depression close to anterior margin; with small, slightly elevated gibbosity about center; abundantly, coarsely punctate, except smooth central gibbosity; lateral gibbosities with dense brownish-yellow pubescence obscuring integument; semicircular anterior gibbosity with abundant, both white and pale-yellow pubescence not obscuring integument; area surrounding central gibbosity with somewhat abundant brownish-yellow pubescence not obscuring integument; sides of central area of posterior fifth with somewhat abundant white pubescence not obscuring integument; sides of posterior fifth with dense blackish pubescence; area of posterior fifth close to blackish pubescence with irregular band with white pubescence basally and apically, and pale-yellow pubescence centrally; remaining surface with sparse dark brown pubescence. Sides of prothorax abundantly, coarsely punctate; with abundant pale-yellow pubescence partially obscuring integument, and white pubescence interspersed. Prosternum with abundant pale-yellow pubescence laterally, moderately sparse yellowish-white pubescence on remaining surface. Prosternal process with yellowish-white pubescence slightly denser than on central region of prosternum; narrowest area 0.55 times procoxal width. Mesoventrite with sparse whitish pubescence centrally, abundant pale-yellow on sides, except almost glabrous area toward mesepimeron. Mesanepisternum and mesepimeron with abundant brownish-yellow pubescence partially obscuring integument. Mesoventral process with sparse whitish pubescence; narrowest area 0.95 times mesocoxal width. Metanepisternum with abundant dark brown pubescence basally not obscuring integument, and abundant pale-yellow pubescence on remaining surface, pubescence denser from middle, with short, decumbent white setae interspersed. Sides of metaventrite with abundant pale-yellow pubescence not obscuring integument; remaining surface with abundant yellowish-white pubescence not obscuring integument, pubescence gradually sparser toward central region. Scutellum with a few short, decumbent, both pale-yellow and white setae. Elytra. Abundantly, coarsely punctate, punctures slightly finer from middle; anterior half subparallel-sided; gradually rounded narrowed from middle and somewhat abruptly narrowed on posterior tenth; posterior tenth somewhat abruptly inclined dorsally; centrobasal crest just gibbose; anterior half and lateral projection toward posterior third with irregular white pubescent maculae, interspersed with yellow pubescence on some maculae, sparse yellow pubescence on brownish-orange areas (almost absent on some regions), and dense blackish pubescence on remaining surface (with yellow pubescence interspersed laterally); anterior and posterior margins of wide oblique dark brownish orange band with white pubescent band, denser on anterior margin; wide oblique dark brownish orange band with dense brownish-yellow pubescence; suture with dense white pubescence from anterior third to apex; area close to apex with abundant yellowish-white pubescence not obscuring integument, except sparser pubescence on dark brown maculae. Legs. Femora with somewhat abundant white pubescence on peduncle, sparse dark-brown pubescence on blackish area of femoral club, and abundant yellowish pubescence partially obscuring integument on remaining surface. Tibiae with abundant white pubescence not obscuring integument on anterior 2/3, except sparse dark brown pubescence with decumbent white setae interspersed on dark macula on dorsal surface and sides; apical third of protibiae with sparse brown pubescence dorsally and laterally, except white pubescence on apex, and ventral surface with abundant, bristly blackish pubescence; posterior third of mesotibiae with abundant, bristly blackish setae dorsally, somewhat sparse, both brownish and white pubescence on sides, and abundant, bristly, yellowish-brown pubescence ventrally; posterior third of metatibiae with sparse brownish pubescence dorsally, except white pubescence on apex, sides with abundant white pubescence, and ventral surface with bristly yellowish-brown pubescence. Dorsal surface of tarsi with abundant white pubescence. Metatarsomere I slightly shorter than II–III together.

Abdomen. Ventrites with abundant white pubescence partially obscuring integument, pubescence denser on apex. Apex of ventrite 5 truncate.

Variation. Scutellum orangish brown centrally, with somewhat abundant yellowish pubescence not obscuring integument.

Dimensions (mm) (Holotype female/ paratype female). Total length, 4.30/4.50; prothoracic length, 0.80/0.95; anterior prothoracic width, 1.10/1.25; posterior prothoracic width, 1.30/1.35; maximum prothoracic width, 1.40/1.50; humeral width, 1.95/2.10; elytral length, 3.15/3.25.

Type material. Holotype female from BOLIVIA, Santa Cruz: 4-6 km SSE Buena Vista, Flora & Fauna Hotel , 16-31.III.2003, Robin Clarke leg. ( FSCA) . Paratype female, same data as holotype ( MZSP, formerly FSCA).

Etymology. We are pleased to name this species in honor of Charyn Micheli (Department of Entomology, National Museum of Natural History, Smithsonian Institution, United States of America) for her contribution to the study of Antillean Lamiinae .

Remarks. Currently, the separation between Styloleptus Dillon, 1956 (= Antilleptostylus Gilmour, 1963 ; = Caribbeana Gilmour, 1963 ), Leptostylus LeConte, 1852 , and Leptostylopsis Dillon, 1956 , based on their definitions and species included into them is almost impossible ( Lingafelter & Micheli 2009; Micheli 2010). Based on the chaotic concept of these three genera, the maintenance of Pygmaleptostylus Gilmour, 1963 and Styloleptoides Chalumeau, 1983 as distinct genera becomes almost impossible. However, we are not proposing the synonymy with one of these three genera because we have insufficient specimens of all species to allow the study of morphological features. Notwithstanding, we are describing the new species in Styloleptus due to the presence of S. nigricans ( Fisher, 1935) in this genus (now a junior synonym of S. lilliputanus ( Thomson, 1865)) . Both, S. charynae sp. nov. and S. lilliputanus share a very similar general appearance, especially the prothoracic shape, elytral pubescent pattern, and presence of a slightly elevated centrobasal crest with tuft of setae on its top.

Styloleptus charynae sp. nov. differs from S. lilliputanus ( Figs 14–16 ) by rounded area of the sides of the prothorax less projected (very projected in S. lilliputanus ), posterior half of the elytra with wide and oblique dark brownish orange band on posterior half (absent in S. lilliputanus ), and pubescence on this band contrasting in color with that on apex (pubescence on the elytral apex not contrasting with that on remaining posterior half in S. lilliputanus ).

Figures

FIGURES 10–16. Styloleptus spp. 10–13) Styloleptus charynae sp. nov., holotype female: 10) Dorsal habitus; 11) Ventral habitus; 12) Lateral habitus; 13) Head, frontal view. 14) Styloleptus lilliputanus (Thomson, 1865), holotype, dorsal habitus. 15) Leptostylus nigricans Fisher, 1935, holotype, dorsal habitus. 16) Leptostylus puertoricensis Fisher, 1935, holotype, dorsal habitus.