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Related to Opisthobranchia: Pulmonata
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Noun1.Opisthobranchia - gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
class Gasteropoda, class Gastropoda, Gasteropoda, Gastropoda - snails and slugs and their relatives
Nudibranchia, order Nudibranchia - comprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slug
class - (biology) a taxonomic group containing one or more orders
References in periodicals archive ?
Direct development in a nudibranch Cadlina laevis with a discussion on developmental processes in the Opisthobranchia.
santarosana Baja California to McAbee Beach Morro Bay, CA Nucella canaliculata Cayucos, CA to Alasca Shell Beach Pteropurpura festiva Baja California to Morro Bay Point Conception, CA Heterobranchia Odostomia eucosmia Baja California to Carmel Palos Verdes, CA Turbonilla kelseyi Baja California to Diablo Canyon Santa Barara, CA Opisthobranchia Polycera alabe Gulf of California to Anacapa Island Cedros Island, BCN Bivalvia Musculus pygmaeus Dillon Beach, CA to Diablo Cove Cayucos (+), CA Ophiuroidea Ophiactis simplex Panama to Morro Bay Santa Cruz Island, CA Taxon New record Reproduction Species Dir.