Prosostoma is an extinct genus of sea urchins belonging to the family Asterostomatidae.
These slow-moving shallow infaunal deposit feeder-detritivores lived during the Eocene of Cuba, from 55.8 to 33.9 Ma.Sepkoski, Jack Sepkoski's Online Genus Database - Echinodermata
Species Prosostoma jimenoi Cotteau 1870
References
External links Natural History Museum