Opisthobranchia

Thesaurus

Noun

Opisthobranchia - gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea haressubclass Opisthobranchiaclass Gasteropoda, class Gastropoda, Gasteropoda, Gastropoda - snails and slugs and their relativesNudibranchia, order Nudibranchia - comprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slugclass - (biology) a taxonomic group containing one or more orders

Opisthobranchia

[ə‚pis·thə′braŋ·kē·ə] (invertebrate zoology) A subclass of the class Gastropoda containing the sea hares, sea butterflies, and sea slugs; generally characterized by having gills, a small external or internal shell, and two pairs of tentacles.

Opisthobranchia

a subclass of gastropod mollusks. The most primitive opisthobranches have an external shell and a muscular foot with lateral processes (parapodia). In the majority of opisthobranches the shell is overgrown by the mantle and is partially or completely reduced. The internal sac is also reduced. Complete secondary bilateral symmetry is characteristic of many opisthobranches. They are hermaphrodites. The majority of species have a swimming larva called a veliger. There are 11 orders, which include about 10,000 species. They inhabit all depths of the ocean; only a few live in fresh waters. The majority are benthonic. There are predacious and herbivorous forms.

Opisthobranchia

Related to Opisthobranchia: Pulmonata

noun

Synonyms for Opisthobranchia

noun gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs

Synonyms

subclass Opisthobranchia

Related Words

class Gasteropoda
class Gastropoda
Gasteropoda
Gastropoda
Nudibranchia
order Nudibranchia
class