Opisthobranchia


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Related to Opisthobranchia: Pulmonata

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 ?
Keywords: Opisthobranchia, Peru, biodiversity, Guayaquil Marine Ecoregion.
Los compuestos de defensa que coevolucionaron en Opisthobranchia, suelen presentar una alta actividad biologica siendo optimos para la investigacion biomedica (Benkendorff, 2000).
La diversidad de Opisthobranchia en el Peru no ha sido estudiada ni utilizada hasta el momento.
2004) especifican la existencia de una gran diversidad de Opisthobranchia en esta zona pero que aun no ha sido estudiada.
The presence of a cephalic shield had been considered a plesiomorphy of Sacoglossa (Jensen, 1996b), because it was also considered a plesiomorphy of Opisthobranchia (Gosliner, 1981; Hasz-prunar, 1985).
Phylogenetic relationships among Opisthobranchia (Mollusca: Gastropoda) based on mitochondrial cox 1.
Cylindrobulla and Ascobulla in the western Atlantic (Gastropoda, Opisthobranchia, Sacoglossa): systematic review, description of a new species, and phylogenetic reanalysis.
Reconstruction of the phylogeny of the Opisthobranchia (Mollusca: Gastropoda) by means of 18s and 28s rRNA gene sequences.