Opisthobranchia

(redirected from opisthobranch)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

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 ?
For video recordings, the annelid larvae and opisthobranch veligers were in a confined space between a slide and a cover glass supported at the corners with modeling clay.
Observations on the opisthobranch mollusks of Punta Gorda, California, with notes on the distribution and biology of Crimora coneja.
Ros, "Oxytoxins, bioactive molecules produced by the marine opisthobranch mollusc Oxynoe olivacea from a diet-derived precursor," Experientia, vol.
Comparative neurobiology of feeding in the opisthobranch seal slug, Aplysia, and the pulmonate snail, Helisoma: evolutionary considerations.
The opisthobranch mollusks Polycera alabe Collier & Farmer, 1964 and Polycera atra MacFarland, 1905 (family Polyceridae Alder & Hancock, 1845) are benthic marine invertebrates found in coastal habitats along the eastern Pacific.
The benthonic opisthobranch species reported for Northern Peru are presented here.
We narrowed this list to characters that are most widely recognized by opisthobranch systematists (T.
Mode of development has been determined for approximately two-thirds of the over 300 species of opisthobranch molluscs known from the northeast Pacific Ocean (Goddard 2004, 2005; Goddard and Hermosillo 2008).
Haszprunar (1985) considered the archtitectibranch groups (Acteonoidea, Ringiculoidea, Diaphanoidea) as the earliest opisthobranch offshoots.
The effect of food consumption on growth, fecundity and mortality in a saccoglossan opisthobranch, Olea hansbwensis.
Remarks.--Pleurobranchus areolatus is a large ([sim]10-15 cm) distinctive opisthobranch, whose dorsal surface is covered with warty orange and reddish-brown tubercles.