Gastropoda Cuvier, 1795
see Class Gastropoda Cuvier, 1795
Nudipleura Wägele & Willan, 2000
Nudibranchia Cuvier, 1814
see Order Nudibranchia Cuvier, 1814
Dexiarchia Schrödl, Wägele & Willan, 2001
Cladobranchia Willan & Morton, 1984
Arminoidea Iredale & O'Donoghue, 1923 (1841)
1 Family Proctonotidae Gray, 1853