Pinnotheres

noun Pin·no·the·res \ ˌpinəˈthi(ˌ)rēz \

Definition of Pinnotheres

: a genus (the type of the family Pinnotheridae) of small crabs (as the oyster crab and the pea crab) having usually a thin membranous covering and living as commensals in the mantle cavity of various bivalve mollusks or in some similar cavity in other marine animals

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Origin and Etymology of pinnotheres

New Latin, from Latin pinoteres, pinotheres crab living in the mantle cavity of the pen shell, from Greek pinotērēs, from pino- (from pinē pen shell) + -tērēs (from tērein to guard)