Poromyidae

Poromyidae is a family of saltwater clams, marine bivalve molluscs in the order Anomalodesmata. The genus Dilemma, described in 2008, is remarkable for being a predator of copepods, which is very unusual for a sessile mollusc.

species of mollusc

Cetoconcha is the only extant genus of saltwater clams in the family Cetoconchidae.