A new genus of Madagascan freshwater crab to accommodate Hydrothelphusa vencesi Cumberlidge, Marijnissen & Thompson, 2007 (Brachyura: Potamoidea: Deckeniidae), and the description of two new congeners. Journal of Crustacean Biology, 43(2), Jun 1 2023: 1-13. 10 [Zoological Record Volume 159]