specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping...

the order Nudibranchia, located in the gastropod mollusc subclass Opisthobranchia (the marine slugs: which consisted of nudibranchs, sidegill slugs,...

slugs", numerous families are within the informal taxonomic group Opisthobranchia: The term "sea slug" is perhaps most often applied to nudibranchs,...

older classification of the gastropods, there were four subclasses: Opisthobranchia (gills to the right and behind the heart). Gymnomorpha (no shell) Prosobranchia...

with a critical review of published records of Glaucidae (Gastropoda, Opisthobranchia)". Proceedings of the Linnean Society of London. 178 (2): 107–123....

"Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". Zoological Journal of the Linnean Society 158: 124–154. doi:10.1111/j...

Heterobranchia Informal group Lower Heterobranchia Informal group Opisthobranchia Clade Cephalaspidea Clade Thecosomata Clade Gymnosomata Clade Aplysiomorpha...

plasticity of radular teeth of the Sacoglossa (= Ascoglossa) (Mollusca: Opisthobranchia) in relation to their food plants". Biological Journal of the Linnean...

suggests a new taxonomy for two Pacific species of sea hares (Mollusca, Opisthobranchia, Aplysiidae). Pacific Science 67: 283–294. Valdés, Alexander, Crocetta...

superfamilies and 5 families. The Acochlidia, a traditional "order" of the Opisthobranchia since their establishment by Odhner have formed one of the unsolved...