Carapace pear-shaped, strongly narrowing anteriorly, dorsally weakly tuberculate, with hooked setae. Rostral spines subparallel, partially fused. Supraorbital margin comprising eave with rounded preorbital angle, obsolete antorbital spine, intercalated spine, and short conical postorbital spine separated from eave by narrow fissures. Basal antennal article notched before anterolateral angle produced as short crenulate tooth, with short distomesial spine. Walking legs with propodi cylindrical. Up to 3 cm long. This species has a characteristic crenulate tooth on the basal antennal article which, together with the shorter rostral spines, distinguishes it from species of Notomithrax. Rocky subtidal reef. Southern temperate oceans, including southern Australia. Not harmful but a nip from large claws could be painfulNative to Australia- DSE Advisory List : Not listed- EPBC Act 1999 : Not listed- IUCN Red List : Not listed