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Opistobranch

Opisthobranchia
Temporal range: Carboniferous–Recent
Notodoris minor.jpg
Aegires minor
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
informal group "Opisthobranchia"

Milne-Edwards, 1848
Included groups

clade Cephalaspidea
clade Thecosomata
clade Gymnosomata
clade Aplysiomorpha
group Acochlidiacea
clade Sacoglossa
group Cylindrobullida
clade Umbraculida
clade Nudipleura


clade Cephalaspidea
clade Thecosomata
clade Gymnosomata
clade Aplysiomorpha
group Acochlidiacea
clade Sacoglossa
group Cylindrobullida
clade Umbraculida
clade Nudipleura

Opisthobranchs (/əˈpɪsθəˌbræŋks, -θ-/) are a large and diverse group of specialized complex gastropods that used to be united in the subclass Opisthobranchia, but are no longer considered to represent a monophyletic grouping because it contains land snails and slugs, the Pulmonata.Euopisthobranchia is a revised collection of opisthobranchs that is monophyletic, but this group leaves out some "traditional" opisthobranchs including the Sacoglossa and the Acochlidiacea. The subclass Heterobranchia now contains the species which used to be assigned to Opisthobranchia plus the Pulmonata.


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Wikipedia

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