Hydrocanthus(Hydrocanthus)paludimonstrus, a New Species from Bolivia (Coleoptera: Noteridae: Hydrocanthini) and its Implications for Classification of the Subgenera

Hydrocanthus (Hydrocanthus) paludimonstrus (new species) is described from specimens collected in Beni, Bolivia. Important morphological features are figured, including male and female genitalia. The character combination present in H. (H.) paludimonstrus makes the species intermediate between Hydrocanthus (Guignocanthus) Young and Hydrocanthus s. str. Based on new evidence from H. (H.) paludimonstrus and re-examination of characters previously used to diagnose the subgenera, H. (Guignocanthus) is synonymized with Hydrocanthus s. str. (new synonymy).