Opisthobranchia

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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.

References in periodicals archive ?
Additional opisthobranch mollusks from Oregon, with a review of deep water records and observations on the fauna of the south coast.
A four year survey of the opisthobranch fauna (Gastropoda, Opisthobranchia) from Baja California Sur, Mexico.
We narrowed this list to characters that are most widely recognized by opisthobranch systematists (T.
The formation of quadrants with remarkable size differences is neither unique for opisthobranch gastropods, nor for mollusks in general.
Developmental mode in benthic opisthobranch mollusks from the Northeast Pacific Ocean: feeding in a sea of plenty.
Feeding behaviour in larvae of the opisthobranch Philine aperta.
Assessing whether larvae of the opisthobranch gastropod Phestilla sibogae Bergh become responsive to three chemical cues at the same age.
Chemical defense and the evolutionary ecology of dorid nudibranchs and some other opisthobranch gastropods.
The feeding mechanism and behavior of the opisthobranch Melibe leonina.
Based on experimental attraction assays performed on the hermaphroditic opisthobranch mollusc Aplysia, chemical substances are released and detected by others of the same species, resulting in mate attraction and mating (Susswein et al.