Cosmisoma luteoviridis, Vlasak & Santos-Silva, 2018

Vlasak, Josef & Santos-Silva, Antonio, 2018, New genus, species, redescription, and new rank in Cerambycinae (Coleoptera, Cerambycidae), Zootaxa 4446 (3), pp. 384-396 : 385-386

Cosmisoma luteoviridis sp. nov.

( Figs 1–5 )

Diagnosis. Cosmisoma luteoviridis is readily distinguished from other species of the genus by its unique orange and metallic green coloration and tufts of black setae only on the inner edge of antennomeres V and IV. The general appearance resembles that of Kozlovellus bicolor Galileo & Santos-Silva, 2017 , especially in its coloration, but K. bicolor lacks antennal tufts and has slightly different pronotal shape and punctation.

Description. Male ( Figs 1–4 ). Head and prothorax metallic green with violaceous reflections, which becomes more evident depending on light source angle, especially on prosternum; mouthparts brownish on some areas; antennae metallic violaceous, but scape with basal area slightly greenish; ventral side of meso- and metathorax violaceous; femora violaceous except dorsal and lateral sides of distal half of club mostly metallic green; tibiae and tarsi violaceous; abdominal ventrites mostly violaceous interspersed with greenish irregular areas, more evident depending on angle of light source.

Head. Frons moderately coarsely, densely, confluently punctate; with minute, sparse golden setae (more grayish-white depending on light source angle). Area between antennal tubercles abundantly, confluently punctate on each side of median groove (punctures finer than on frons). Remaining surface of vertex moderately coarsely, abundantly, confluently punctate except transversely striate area close to prothoracic margin; with minute, sparse golden setae (more grayish-white depending on light source angle). Area behind upper eye lobes moderately coarsely, densely, confluently punctate; with a few long, erect dark setae close to eye. Area behind lower eye lobes mostly obliquely striate except moderately coarsely, densely, confluently punctate area close to eye from about middle to genae; punctate area with both short and long, erect, sparse golden setae (more grayish-white depending on light source angle), glabrous on remaining surface. Antennal tubercles with sculpturing as on frons frontally, gradually finely punctate toward posterior side near apex, nearly smooth toward upper eye lobes, smooth on apex; with minute, sparse golden setae frontally (more grayish-white depending on light source angle), glabrous on remaining surface. Median groove distinct from clypeus to area between upper eye lobes, distinctly deeper between antennal tubercles. Genae 0.7 times length of lower eye lobe, moderately coarsely, confluently, abundantly punctate except smooth narrow distal area; with short, sparse golden setae. Postclypeus partially smooth on central area close to frons, coarsely, abundantly, confluently punctate on remaining surface except smooth extreme lateral side; glabrous on central area close to frons and extreme lateral sides, with minute, sparse golden setae on remaining surface; with long, erect seta on each side of punctate area. Labrum coplanar with anteclypeus on basal area, distinctly inclined toward apex; finely punctate on basal area; with short, sparse golden setae on basal area, with both short and long, abundant golden setae on distal area. Gulamentum nearly smooth close to prothoracic margin, distinctly transversely striate between eyes (more subcircular toward mentum), laterally interspersed with moderately fine punctures; with long, erect, moderately sparse yellowish-brown setae. Distance between upper eye lobes 0.50 times length of scape; in frontal view, distance between lower eye lobes 0.45 times length of scape. Antennae 3.25 times elytral length, reaching elytral apex at basal area of antennomere VI; scape slightly longitudinally sulcate at basal third, moderately coarsely, densely punctate, with minute, sparse golden setae, with long, erect dark setae ventrally (more abundant at distal half); antennomeres with short golden setae not obscuring integument; antennomere III with long, erect, abundant dark setae ventrally, slightly denser distally; antennomere IV with long, erect, moderately sparse dark setae ventrally, forming distinct tuft with longer setae distally; antennomere V with moderately long, sparse setae ventrally, forming distinct tuft with longer setae at distal third (denser than on IV); antennomeres III–IV carinate dorsally; antennal formula (ratio) based on length of antennomere III: scape = 0.56; pedicel = 0.11; IV = 1.00; V = 1.11; VI = 0.85; VII = 0.80; VIII = 0.81; IX = 0.83; X = 0.77; XI = 0.92.

Thorax. Prothorax 1.2 times longer than wide, distinctly wider basally than distally, basal and distal constrictions well-marked, sides uniformly rounded. Pronotum with two slightly distinct gibbosities on each side close to constrictions, central gibbosity nearly absent; basal sulcus wide, arched, shallow (slightly deeper centrally); finely, densely punctate; distal sulcus deep, especially centrally, sinuous; finely, densely punctate, coarsely toward central area, especially on distal half, except moderately wide central band, from base to distal constriction, finely, transversely striate-punctate on its basal 2/3, only punctate on its distal third; area between distal sulcus and distal margin finely, densely punctate (slightly striate-punctate centrally); with minute, golden setae on each side of central band, denser on basal half; with a few long, erect dark setae. Sides of prothorax finely, abundantly punctate on wide central area (punctures slightly sparser at centro-longitudinal area); basal area smooth; distal area tumid (this area widened toward prosternum), transversely striate. Prosternum finely, densely rugose-punctate from procoxal cavities to after middle, tumid, transversely striate on remaining surface; with yellowish-white pubescence not obscuring integument on rugose-punctate area, interspersed with long, erect, sparse yellowish-white setae; with very sparse yellowish-white pubescence on striate area, interspersed with a few long, erect yellowish-white setae. Ventral side of meso- and metathorax with yellowish-white pubescence (more whitish depending on light source angle), partially obscuring integument (sparser on central area of mesoventrite), interspersed with long, erect, moderately abundant yellowish-white setae. Scutellum finely, densely punctate; with golden pubescence not obscuring integument, denser on distal half. Elytra. Opaque, 3.0 times as long as wide across humeri, uniformly microreticulate; longitudinally carinate dorsally, from base to about distal quarter; apex acuminate; with abundant golden pubescence not obscuring integument. Legs. Femora with golden pubescence not obscuring integument. Protibiae with golden pubescence not obscuring integument dorsally and laterally, dense, bristly, gradually longer toward apex ventrally; mesotibiae with golden pubescence not obscuring integument, slightly denser, gradually bristly toward apex ventrally; metatibiae with golden pubescence not obscuring integument; meso- and metatibiae with long, erect, sparse dark setae.

Abdomen. Ventrites densely micropunctate except smooth, transverse distal area of ventrites I–IV; apex of ventrite V widely rounded; all ventrites with yellowish-white pubescence partially obscuring integument (more whitish depending on light source angle), except glabrous smooth area of ventrites I–IV.

Female ( Fig. 5 ). Antennae 2.65 times elytral length, reaching elytral apex near apex of antennomere VI; apex of abdominal ventrite V somewhat triangular, more distinctly projected centrally.

Dimensions in mm (holotype male/ paratypes). Total length, 10.65/9.40–11.70; elytral length, 6.50/5.80–7.30; humeral width, 2.15/1.90–2.40; pronotal length, 2.10/1.80–2.30; pronotal width, 1.70/1.50–1.85.

Type Material. Holotype male and allotype female from COSTA RICA, Puntarenas: Tarcoles , 18.IV.2015, J. Vlasak col. ( MZSP). Paratypes (5 males and 5 females) with the same label ( JVC).

Etymology. Latin, luteus (orange-yellow), viridis (green), referring to the coloration of the species.

Remarks. As already pointed out, the general appearance of C. luteoviridis resembles that of Kozlovellus bicolor , differing by the generic features. From the species of Cosmisoma , the new species is more similar to C. cyaneum rubriventre Monné & Magno, 1988 , C. gratum Monné & Magno, 1988 , C. persimile Gounelle, 1911 , and C. viridescens Galileo & Martins, 2010 , due to the tuft of erect setae of the antennomere V not notably long and dense. However, C. luteoviridis differs from those species by the light colored elytra (metallic green in all those species). From C. gratum , the new species also differs notably by the slender prothorax (distinctly widened in C. gratum ). Cosmisoma luteoviridis differs from C. ochraceum (Perty, 1832) , a species with light colored elytra, by the prothorax metallic green (reddish-brown in C. ochraceum ), elytra without longitudinal pubescent band (present in C. ochraceum ), and by the tuft of erect setae of the antennomere V moderately short (distinctly dense and long in C. ochraceum ).

Figures

FIGURES 1–9. 1–5, Cosmisoma luteoviridis: 1, Dorsal habitus, holotype male; 2, Ventral habitus, holotype male; 3, Lateral habitus, holotype male; 4, Head, frontal view, holotype male; 5, Dorsal habitus, paratype female. 6–9, Katerinaella costaricensis, holotype male: 6, Dorsal habitus; 7, Ventral habitus; 8, Lateral habitus; 9, Head, frontal view.