Cosmisoma viridescens Galileo and Martins 2010, new species

Cosmisoma viridescens Galileo and Martins, new species

(Figure 7)

Description. Head with a metallic-green integument. Frons and vertex punctate; punctures more sparse on the vertex. Antennae reach the elytra apexes at the apical one third of antennomere V. Scape metallicblue and irregularly punctate. Irregular fringe of long hairs on the internal edge of the scape, pedicel and antennomeres III-V. Apical region of antennomere V with a small tuft of long hairs on the internal edge.

Prothorax reddish with anterior constriction and narrow basal region metallic-green; sides discretely rounded. Pronotum glabrous, punctate except for a center-longitudinal band; the greenish areas transversely striate along the posterior edge and microcorrugations along the anterior edge. Scutellum punctate.

Elytra (Figure 7) metallic-green, punctate with a wide, dorsal and golden pubescence band, from the base to the apex. Lateral margins slightly narrowed towards the apex. Elytral apices acuminate.

Ventral surface metallic-green with dense sericeous pubescence. Metepisterna reddish. Legs with sparse sericeous pubescence and a few long hairs on the tibiae. Mesocoxae, metacoxae and bases of metafemora reddish. Metatibiae curved, without tuft of hairs.

Measurements in mm. Total length, 7.3; prothorax length, 1.7; largest prothoracic width, 1.4; elytra length, 4.7; humeral width, 1.8.

Type material. Male holotype, BRAZIL, Bahia: São Félix do Coribe-Coribe, (km 24, 13 o 33’S 44 o 15’W, 493 m), 07.XII.2007, F. Bravo col. (UEFS).

Etymology. Latin, viridescens = which becomes green; allusion to the integument color.

Diagnosis. Cosmisoma viridescens sp. nov. could be compared with C. gratum Monné and Magno, 1988 by antennomere V, with small hair tuft on the apex; prothorax reddish; antennae and legs black, with discrete metallic-blue reflexes; elytra unicolored with metallic-green gloss and the metatibiae with hair tufts. It is distinguished by its black head and reddish-orange pronotum with a metallic-green band along the margins. The head and prothorax of C. gratum are completely reddish.