Three additional new genera of acidocerine water scavenger beetles from the Guiana and Brazilian Shield regions of South America (Coleoptera, Hydrophilidae, Acidocerinae) Author Giron, Jennifer C. Department of Ecology & Evolutionary Biology, and Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA https://orcid.org/0000-0002-0851-6883 entiminae@gmail.com Author Short, Andrew Edward Z. Department of Ecology & Evolutionary Biology, and Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA text ZooKeys 2019 855 109 154 http://dx.doi.org/10.3897/zookeys.855.33013 journal article http://dx.doi.org/10.3897/zookeys.855.33013 1313-2970-855-109 F5A7AE8B38834CFD859FB2F3F9A079C0 F460A02DFFD1FB56FFF2FF94FFB2FFAC 3251190 Primocerus striatolatus sp. nov. Figs 13 D-F , 14K , 15B Type material. Holotype (♂): "SURINAME: Sipaliwini District/ 2°58'36.7782"N , 55°24'40.986"W ; 400 m/ Camp 4 (high) Kasikasima; White Rock/ seepage area on trail; 24.iii.2012/ leg. A. Short; SR12-0324-01B" (NZCS). Paratypes (1): SURINAME: Sipaliwini District : Same data as holotype (SEMC, 1). Differential diagnosis. Primocerus striatolatus can be recognized by the presence of sharply impressed elytral punctures, with serial punctures well differentiated (larger and deeper than remainder punctures), longitudinally aligned to form elytral striae. It is similar to P. semipubescens , from which it can be differentiated by the hydrofuge pubescence of the metafemora covering basal 3/4 of the anterior surface (covering less than basal half in P. semipubescens ). It is also very similar to P. petilus , from which it can be differentiated by the elytral striae IX and X clearly impressed along their entire length (Fig. 13E ; elytral striae IX and X undefined along their basal fourth in P. petilus , Fig. 13B ). Description. Body length 3.1 mm, width 1.6 mm. Body elongate oval, strongly convex (Fig. 13D, E ). General coloration dark brown. Elytra with ground punctures sharply marked, and well-defined rows of serial punctures (forming elytral striae); elytral striae very slightly impressed along posterior half of elytra. Posterior elevation of mesoventrite with simple, curved, transverse ridge. Metafemora with hydrofuge pubescence covering basal 4/5 of anterior surface. Apex of fifth abdominal ventrite rounded. Aedeagus (Fig. 14K ) with basal piece nearly as long as parameres; parameres nearly as long as median lobe (median lobe inserted further into basal piece, thus appearing shorter than parameres); apex of parameres rounded; apex of median lobe rounded. Etymology. Named from the word stria , combined with the Latin word latus meaning broad, in reference to the comparatively broad shape of the body and the clearly defined elytral striae in this species. Distribution. Primocerus striatolatus has only been collected at one locality in the Kasikasima region in Suriname, at an elevation of 400 m (Fig. 15B ). Remarks. Collected on a forested seepage that had lots of detritus.