Carapace as long as wide, walls strongly converging ventrally; rostrum deflexed, with shallow rostral keel. Claws (chelipeds) with weakly spatulate fingers. Walking legs with 7th article (dactyli) widest at midpoint. Up to 1.5 cm wide.
Nothing is known of the biology of the Triangle Crab but it probably uses its fine claws to pick up tiny fragments of food among the algae where it hides. As with any small benthic invertebrate of soft sediments, hymenosomatids feature in the diet of demersal fishes. This western Pacific genus is represented in Australia by two species, one tropical and one temperate.
Estuarine and low intertidal, to depths of 13 m.
Southern temperate oceans, including southern Australia.
Not harmful but a nip from large claws could be painful.
Native to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed