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Opisthobranchia

Classification

Heterobranchia [subclass]
(344 species)
Opisthobranchia [superorder] (169)
Anaspidea [order] (13)
Cephalaspidea [order] (34)
Nudibranchia [order] (68)
Runcinacea [order] (1)
Sacoglossa [order] (29)
Thecosomata [order] (19)
Umbraculida [order] (1)

Classification

Heterobranchia [subclass]
(344 species)
Opisthobranchia [superorder] (169)
Anaspidea [order] (13)
Cephalaspidea [order] (34)
Nudibranchia [order] (68)
Runcinacea [order] (1)
Sacoglossa [order] (29)
Thecosomata [order] (19)
Umbraculida [order] (1)

Species/taxa with photo(s): 8