Three additional new genera of acidocerine water scavenger beetles from the Guiana and Brazilian Shield regions of South America (Coleoptera, Hydrophilidae, Acidocerinae)
Girón Duque,Jennifer C. | Short,Andrew
Recent study of the water scavenger beetle subfamily Acidocerinae in the Neotropical region has uncovered numerous undescribed species that are not able to be placed in existing genera. Here, we describe three new genera to accommodate 17 of these new species from South America: Aulonochares gen. nov. for Aulonochares lingulatus sp. nov. (French Guiana, Suriname), Aulonochares novoairensis sp. nov. (Brazil), and Aulonochares tubulus sp. nov. (Brazil, Guyana, Suriname, Venezuela); Ephydrolithus gen. nov. for Ephydrolithus hamadae sp. nov. (Brazil), Ephydrolithus minor sp. nov. (Brazil), Ephydrolithus ogmos sp. nov. (Brazil), Ephydrolithus spiculatus sp. nov. (Brazil), and Ephydrolithus teli sp. nov. (Brazil); and Primocerus gen. nov. for Primocerus cuspidis sp. nov. (Venezuela), Primocerus gigas sp. nov. (Venezuela), Primocerus neutrum sp. nov. (Guyana, Suriname, Venezuela), Primocerus ocellatus sp. nov. (Venezuela), Primocerus petilus sp. nov. (Brazil), Primocerus pijiguaense sp. nov. (Venezuela), Primocerus maipure sp. nov. (Venezuela), Primocerus semipubescens sp. nov. (Guyana), and Primocerus striatolatus sp. nov. (Suriname). The genus Ephydrolithus gen. nov. is currently known to be restricted to seepages in the mountainous regions of the Brazilian Shield. Aulonochares gen. nov. and Primocerus gen. nov. are both currently only known from the Guiana Shield, though widespread in that region where they are associated with streams and seeps. We present differential diagnoses, maps, habitat details, and illustrations of all new genera and species here described.
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