Oedignathus inermis

Oedignathus inermis, commonly known as the granular claw crab, paxillose crab, or tuberculate nestling lithode crab, is a species of king crab in the subfamily Hapalogastrinae. It is found off the Pacific coasts of the United States and Canada, from California to the Chukchi Sea. It is also distributed in the Russian Far East and disjunctly around the coasts of Japan. It is the only species in the genus Oedignathus, from Ancient Greek οἰδάω (oidáō), meaning "to swell", and γνάθος (gnáthos), meaning "jaw".

==Description== Oedignathus is distinguished from other king crabs in the subfamily Hapalogastrinae by the presence of numerous tubercles on the only slightly flattened chelipeds and legs, and by the paucity of spines, setae; other genera have flattened chelipeds covered in setae, and legs with several large spines.