Parapinnixa affinis [SEP] IUCN conservation status
but this record is doubtful.
Conservation and ecology.
"Parapinnixa affinis" was one of only two marine crustaceans to be included on the IUCN's list of endangered species in 1996, the other being the coconut crab. Many others have been added later.
It lives commensally in the tubes of the polychaete worms "Terebella californica" and "Loimia". A bryozoan from the family Vesiculariidae is sometimes found on the legs of "P. affinis".
Taxonomy.
"Parapinnixa affinis" was first described
Parapinnixa affinis
Parapinnixa affinis, the California Bay pea crab, is a species of pinnotherid crab endemic to Southern California. It is a small crab that lives commensally in the tube of a tube-dwelling worm. It was one of the first marine crustaceans to be included on the IUCN Red List in 1996.
Description.
"Parapinnixa affinis" is similar to other pea crabs of the genus "Parapinnixa", especially "P. nitida". It differs from "P. nitida" in the proportions of its carapace