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subclass opisthobranchia

 
Noun subclass opisthobranchia has 1 sense
  1. Opisthobranchia, subclass Opisthobranchia - gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
    --1 is a kind of class
    --1 is a member of Gastropoda, class Gastropoda, Gasteropoda, class Gasteropoda
    --1 has members: Nudibranchia, order Nudibranchia
subclass homobasidiomycetes subclass infusoria subclass lepidosauria subclass liliidae subclass magnoliidae subclass malacostraca subclass metatheria subclass ophiurida subclass opisthobranchia subclass ostracoda subclass pantotheria subclass phytomastigina subclass prototheria subclass rhizopoda subclass rosidae subclass selachii subclass synapsida

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