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 ?
Barreira et al., "The relationship between seaweed diet and purple ink production in Aplysia dactylomela Rang, 1828 (Gastropoda: Opisthobranchia) from Northeastern Brazil," Journal of Shellfish Research, vol.
Reproductive patterns and seasonal occurrence of the sea hare Aplysia brasiliana Rang (Gastropoda, Opisthobranchia) at South Padre Island, Texas.
Laboratory culture of the aeolid nudibranch Spurilla neopolitana (Mollusca, Opisthobranchia): life history aspects.
New records of Flabellinidae (Opisthobranchia: Aeolidacea) from the tropical Americas, with descriptions of two new species.
This pattern appears to be characteristic for the Opisthobranchia and Pulmonata, and it strengthens the assumption that the Euthyneura (Opistho-branchia plus Pulmonata) form a single holophyletic group, in which the mesentoblast is formed at the 24-cell stage, distinctively earlier than in an allogastropod outgroup such as the Valvatoidea.
The digestive cells of the hepatopancreas in Aplysia depilans (Mollusca, Opisthobranchia): ultrastructural and cytochemical study.
A four year survey of the opisthobranch fauna (Gastropoda, Opisthobranchia) from Baja California Sur, Mexico.
Palabras clave: Opisthobranchia, Peru, biodiversidad, Ecorregion marina de Guayaquil.
Larvas de gasteropodos (Nodolottorina sp., Naticidae y Opisthobranchia) y planarias, predominaron en superficies lisas, al igual que la mayoria de los grupos gelatinosos (ctenoforos, hidromedusas, sifonoforos y salpas), que se caracterizan por su escasa movilidad.
An investigation of some aspects of bryozoan predation by dorid nudibranchs (Mollusca: Opisthobranchia).