Primocerus cuspidis
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Ordo: Coleoptera
Familia: Hydrophilidae
Genus: Primocerus
Name
Primocerus cuspidis Girón & Short, 2019 sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
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
Primoceruscuspidis 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
Primoceruscuspidis 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).
Original Description
- Girón, J; Short, A; 2019: Three additional new genera of acidocerine water scavenger beetles from the Guiana and Brazilian Shield regions of South America (Coleoptera, Hydrophilidae, Acidocerinae) ZooKeys, 855: 109-154. doi
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