Nasocomptus obyberaba, Vanin, Sergio Antonio & Gaiger, Fabio, 2005

Vanin, Sergio Antonio & Gaiger, Fabio, 2005, A cladistic analysis of the genera of the tribe Entimini (Coleoptera, Curculionidae), with description of a new genus and species from the Amazonian Region, Zootaxa 1053, pp. 1-21 : 15-19

Nasocomptus obyberaba , sp. nov.

( Figs 30–47 )

Types. Holotype male: “ BRASIL, Rondônia, Ouro Preto do Oeste, XI. 1983 Becker, Roppa & Silva” (MNRJ). Paratype female; same locality and data (MZSP). Paratype male: “ Pérou, Chanchamayo; Museum Paris, ex. Coll. R. Oberthur” (MNHN).

Description. Length (rostrum excluded) and humeral width (mm): holotype male (12.9; 6.3); paratype male (13.6; 6.5); paratype female (14.1; 6.7).

Color: integument black, dark reddish brown on antennae and tarsomeres, clothed dorsally and ventrally by flat rounded scales, most of which metallic green with bluish or golden iridescence, and a variable number of irregular, small clusters of rounded dull scales over pronotum and dorsal area of elytra; on ventral side, a few elongate erect scales intermixed among the rounded ones, chiefly on ventrites; stiff setae present on legs. Prothorax and elytra with granules, without metallic scales; granules of pronotum irregular, those of elytra rounded and irregularly aligned on interstriae.

Prothorax transverse, about 1.3 times wider than long; anterior and posterior regions constricted, sides rounded, greatest width near anterior third; post­medial carina narrow and bare, not reaching the base. Sides and disc with irregular granules, some coalescent, each granule bearing a single erect setiform scale; dark mat scales forming three irregular spots, a pair near posterior third of disc, and a third spot on middle of base. Vibrissae of postocular lobes curved, yellowish ( Figs 31 and 45 ).

Scutellum ( Fig. 34 ) very prominent, about 1.3 times as long as wide; black, with a few sparse, greenish, elongate oval scales.

Elytra 3.5 times longer than pronotum, 1.50–1.55 times as long as wide (holotype 1.55X; paratype male 1.51X; paratype female 1.54X); dark dull scales forming irregular spots on humeral region and near elytral declivity; additional smaller spots may be present on disc; elytral striae partly obliterated by rounded scales.

Ventrite V ( Fig. 46 , male) sub­trapezoidal, about 2.2 times wider than long, apex truncate rounded, with a median, setulose, V­shaped depression; Ventrite V ( Fig. 47 , female) sub­triangular, about 1.6 times wider than long, apex pointed and weakly convex, with scales and short setae present.

Male genitalia ( Figs 42 and 43 ). Median lobe about 0.4 times as long as median struts; lateral margins converging from base to near distal fourth, then strongly constricted and forming acute apex ( Fig. 42 ); weakly curved in lateral view, but dorsal margin strongly convex.

Female genitalia ( Figs 40 and 41 ). Coxites compressed laterally, each one about 3 times as long as high (lateral view), apex rounded and setulose, stylus ventral and preapical, very small and inconspicuous. Spermatheca U­shaped.

Etymology: obyberaba , from the Tupi language, oby = green or blue and beraba = shining, bright; in reference to the bright green/blue color of the species.

Type locality: BRAZIL, Rondônia, Ouro Preto do Oeste.

Geographic distribution: Nasocomptus obyberaba is known from Peru (Junin) and Brazil (Rondonia).

Remarks: Some other insects present a similar distribution, being represented in the Oriental Andean slopes (Chanchamayo Valley 11° 05’ S and 75° 32’ W) and the Amazonian Region (as Ouro Preto do Oeste 10° 40’ S and 62° 18’ W). Among the weevils ( Vanin, 1986), one could mention Prosicoderus ibis (Kirsch, 1874) , and among the megachilid bees ( Urban, 2004), Anthodioctes indescriptus (Dalla Torre, 1890) . It should be stressed that according to Hueck (1972) the vegetation of the Oriental Andean slopes shows affinities with the Amazonian Forest.

Figures

FIGURES 30 – 39. Nasocomptus obyberaba sp. nov. 30, Head and antenna of male, frontal view; 31, Head of male, lateral view; 32, Head of female, frontal view; 33, Intercoxal process of mesosternum, ventral view; 34, scutellum, dorsal view; 35, left profemur and protibia, posterior view; 36, left posterior corbel, posterior view, arrow pointing the articular area of hind tibiae without scales; 37, posterior tarsal claw of female, frontal view; 38, posterior tarsal claw of male, frontal view; 39, right anterior tarsus, frontal view.

FIGURES 40 – 43. Nasocomptus obyberaba sp. nov. 40, female genitalia, dorsal view; 41, female genitalia, lateral view; 42, male genitalia, dorsal view; 43, male genitalia, lateral view.

FIGURES 44 – 47. Nasocomptus obyberaba sp. nov. 44, male, dorsal view; 45, male, lateral view 46, ventrites of male. Note sub­trapezoidal ventrite V; 47, ventrites of female. Note sub­triangular ventrite V.