Opisthobranchia

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Noun1.Opisthobranchia - gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
class Gasteropoda, class Gastropoda, Gasteropoda, Gastropoda - snails and slugs and their relatives
Nudibranchia, order Nudibranchia - comprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slug
class - (biology) a taxonomic group containing one or more orders
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References in periodicals archive
Porifera, Ctenophora, Platyhelminthes, Opisthobranchia and Pulmonata of the Mollusca; Clitellata of the Annelida; Bryozoa (Hodgson, 2009).
Impacts associated with the recent range shift of the aeolid nudibranch Phidiana hiltoni (Mollusca, Opisthobranchia) in California.
Annotated checklist of Florida ascoglossan Opisthobranchia. Nautilus 97: 1-13.
In a similar way to the Bivalvia, gastropods usually produce an external protective shell made from calcium carbonate; exceptions are seen in species of Opisthobranchia where the shell is reduced, internal, or absent (Fretter & Graham 1994).
N X S X Anthozoa Ptilosarcus gumeyi N X (Sea Pen) S X Metridium farcimen O X X (White Plume Anemone) Mollusca Gastropoda Subclass: N X Opisthobranchia S X X (nudibranch) O X Nassarius mendicus N X X (snail) S O Aplysia spp.
Organogenesis and histogenesis in the planktotrophic veliger of Doridella steinbergae (Opisthobranchia: Nudibranchia).
Egg-size and -number variations related to maternal size and age and the relationship between egg size and larval characteristics in an annual marine gastropod Haloa japonica (Opisthobranchia; Cephalaspidea).
The release of bright purple ink from the ink glands of many species of sea hares (Gastropoda: Opisthobranchia: Anaspidea) is a major component of their defensive arsenal against predators [1-4].
Anatomy of an invasion: systematics and distribution of the introduced opisthobranch snail, Haminoea japonica Pilsbry, 1895 (Gastropoda: Opisthobranchia: Haminoeidae).
Origins and relationships of primitive members of the Opisthobranchia. Biol.
Revision of the world species of Aplysia (Gastropoda, Opisthobranchia).
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