A new genus, Arachnothelphusa gen. nov., is established for five species of Bornean freshwater crabs (Gecarcinucidae) previously placed in Thelphusula Bott, 1969. One species from Sabah, A. terrapes, is here described as new. The genus is characterised by its long ambulatory legs, shape of the carapace and structure of the male pleopods.

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Keywords Crustacea, Decapoda, Brachyura, Gecarcinucidae, Arachnothelphusa gen. nov., Arachnothelphusa terrapes spec. nov., semiterrestrial freshwater crabs, Borneo
Journal Zoologische Mededelingen

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Ng, P.K.L. (1991). Bornean freshwater crabs of the genus Arachnothelphusa gen. nov. (Crustacea: Decapoda: Brachyura: Gecarcinucidae). Zoologische Mededelingen, 65(1), 1–12.