''Gemmotheres'' also known as the jewel-box pea crab, is a

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

genus of

pea crab The pea crab, ''Pinnotheres pisum'', is a small crab in the family Pinnotheridae that lives as a parasite in oysters, clams, mussels, and other species of bivalves. Description Pea crabs are small crustaceans about the size of a pea or dime, wit ...

, which was erected in 1996 to hold the species ''Gemmotheres chamae'' (formerly ''Pinnotheres chamae''). The species lives as a

commensal Commensalism is a long-term biological interaction (symbiosis) in which members of one species gain benefits while those of the other species neither benefit nor are harmed. This is in contrast with mutualism, in which both organisms benefit fro ...

of the corrugate jewelbox, ''

Chama congregata ''Chama congregata'', or the corrugated jewel box clam, is a species of bivalve mollusc in the family Chamidae. It can be found along the Atlantic coast of North America, ranging from North Carolina to the West Indies and Bermuda ) , an ...

''.

References

Pinnotheroidea Crustaceans of the Atlantic Ocean Monotypic arthropod genera {{crab-stub