former taxonomy:
Class: GASTROPODA  Cuvier, 1797
Subclass: OPISTHOBRANCHIA  Milne-Edwards, 1848
Order: NUDIBRANCHIA  Cuvier, 1817

on the recent taxonomy see WoRMS:
MolluscaBase eds.(2023). Ardeadoris  Rudman, 1984. Accessed through:
World Register of Marine Species
at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=549843 on 2023-09-04