Primocerus cuspidis sp. nov. Figs 11 A–D, 14L, 15B, 16A

Type material.

Holotype (♂): "VENEZUELA: Amazonas/ 5°23.207'N, 67°36.922'W; 125 m/ Tobogán de la Selva, old “Tobogancito” / on seepage area with detritus/ 8.viii.2008; leg. A. Short, M. García, / L. Joly; AS-08-080b" (MIZA). Paratypes (3): VENEZUELA: Amazonas: same data das holotype (SEMC, 3).

Differential diagnosis.

Primocerus cuspidis belongs to the group of species with shallowly impressed, rather irregularly distributed, and undifferentiated elytral punctures. It can be easily distinguished among its congeners by its paler (orange) coloration, and the presence of a sharp, pyramidal (triangular) projection on the posterior elevation of the mesoventrite.

Description.

Body length 2.4 mm, width 1.5 mm. Body elongate oval, moderately convex (Fig. 11B). General coloration orange-brown. Elytra with ground punctures shallowly marked; serial punctures absent. Posterior elevation of mesoventrite with sharply pointed pyramidal (triangular) spine. Metafemora with hydrofuge pubescence covering basal 4/5. Apex of fifth abdominal ventrite slightly emarginate. Aedeagus (Fig. 14L) with basal piece 1.3 × longer than parameres; parameres 1.15 × longer than median lobe; distal end of parameres with anteapical constriction, apex rounded and obliquely directed; apex of median lobe widely rounded.

Etymology.

Named with the Latin word cuspidis meaning point, in reference to the sharp projection on the posterior elevation of the mesoventrite.

Distribution.

Primocerus cuspidis has only been collected at Tobogán de la Selva in the Venezuelan Amazon, at an elevation of 125 m (Fig. 15B).

Remarks.

The type series was collected in a flat, horizontal seepage area that was formed from water seeping from the banks of the Rio Coromoto (Fig. 16A).