Onchidoris hystricina
Onchidoris hystricina is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae. Distribution. This species was described from a specimen collected by William Healey Dall in Alaska at Kyska Island, Aleutian Islands. It is considered by some authors to be a synonym of "Onchidoris muricata". The name was used incorrectly for the species "Diaphorodoris lirulatocauda" on the Pacific coast of the US and Canada.