previously placed in the Order: SACOGLOSSA, in the Subclass: OPISTHOBRANCHIA

Class:  Gastropoda  Cuvier, 1797
Subclass:  Heterobranchia  J.E. Gray, 1840
Clade:  Euthyneura  Spengel, 1881
Clade:  Panpulmonata  Jörger et al., 2010
Clade:  Sacoglossa  von Ihering, 1876
Subclade: Plakobranchacea  Jensen, 1996

Superfamily:  Plakobranchoidea  J.E. Gray, 1840
Family:  Plakobranchidae  J.E. Gray, 1840

Elysia patagonica

Elysia sp. 21