''Antrocarcinus petrosus'' is a species of

crab Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...

in the family Xanthidae, the only species in the genus ''Antrocarcinus''.

References

Xanthidae Monotypic decapod genera {{Crab-stub