Noun | 1. | ![]() Mollusca, phylum Mollusca - gastropods; bivalves; cephalopods; chitons gastropod, univalve - a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes family Haliotidae, Haliotidae - abalones family Strombidae, Strombidae - the family of conchs family Limacidae, Limacidae - slugs family Neritidae, Neritidae - neritids Buccinidae, family Buccinidae - whelks Cymatiidae, family Cymatiidae - tritons family Naticidae, Naticidae - moonshells family Littorinidae, Littorinidae - periwinkles limpet - any of various usually marine gastropods with low conical shells; found clinging to rocks in littoral areas family Patellidae, Patellidae - marine limpets family Fissurellidae, Fissurellidae - marine limpets Ancylidae, family Ancylidae - freshwater gastropod Opisthobranchia, subclass Opisthobranchia - gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares Akeridae, family Akeridae - bubble shells order Pulmonata, Pulmonata - large order of gastropods usually breathing by means of a lung-like sac comprising most land snails and slugs and many freshwater snails order Pectinibranchia, Pectinibranchia - large order of gastropods comprising univalve mollusks that have a single gill resembling a comb Amphineura, subclass Amphineura - a class of Gastropoda class - (biology) a taxonomic group containing one or more orders |