former taxonomy:
Class: GASTROPODA Cuvier, 1797
Subclass: OPISTHOBRANCHIA Milne-Edwards, 1848
Order: THECOSOMATA de Blainville, 1823
on the recent taxonomy see WoRMS:
MolluscaBase eds. (2022). Diacria J.E. Gray, 1840 . Accessed through:
World Register of Marine Species
at:
http://www.marinespecies.org/aphia.php?p=taxdetails&id=137755 on 2022-01-25
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