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previously placed in the Order: ANASPIDEA, in the Subclass: OPISTHOBRANCHIA
Class: Gastropoda Cuvier, 1797
Subclass: Heterobranchia J.E. Gray, 1840
Infraclass: Euthyneura Spengel, 1881
Subterclass: Tectipleura Schrödl, Jörger, Klussmann-Kolb & Wilson, 2011
Order: Aplysiida Pelseneer, 1906
Superfamily: Akeroidea Mazzarelli, 1891
Family: Akeridae Pilsbry, 1893