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 Aulonochares lingulatus sp. nov. Figs 1 G-I , 2H, I , 3 , 4A Type material. Holotype (♂): "SURINAME: Sipaliwini District; 2.97731N , 55.38500W ; 200 m; Camp 4 (low), Kasikasima; sandy stream on trail to METS camp; 20.iii.2012; leg. A. Short; SR12-0320-02A" (NZCS). Paratypes (12): FRENCH GUIANA : "Unnamed Trib. To Crique Nouvelle France, 3.59627N , 53.17637W , above Courant double; 09.xi.2016, leg. D. Post" (SEMC, 1, DNA voucher specimen SLE 1173). SURINAME: Sipaliwini District : Same data as holotype (NZCS, SEMC, 10, including DNA voucher SLE 415); same, except "sandy creek, trail to Kasikasima; flotation; 22.iii.2012; SR12-0322-02A" (SEMC, 1). Differential diagnosis. Aulonochares lingulatus can be distinguished by its orange brown general coloration (Fig. 1 G-I ), and the shape of the median lobe of aedeagus, which is broad and flat (Fig. 2I ). Description. Body length 6.0-6.5 mm, width 3.2-3.6 mm. General coloration orange brown (Fig. 1 G-I ). Aedeagus (Fig. 2I ) with outer margins of parameres subparallel, slightly diverging apically; median lobe flat, gradually widening towards apical region, widely rounded at apex. Etymology. Named with the Latin word lingulatus meaning tongue-like, after the shape of the median lobe of the aedeagus in this species. Distribution. Aulonochares lingulatus is known from the area surrounding Mt. Kasikasima in Suriname and a locality in central French Guiana (Fig. 3 ). Remarks. All specimens were collected in densely forested sandy streams (Fig. 4A ).