Class: Gastropoda  Cuvier, 1797
Subclass:  Heterobranchia  J.E. Gray, 1840
Clade:  Euthyneura  Spengel, 1881
Superorder:  Panpulmonata  Jörger et al., 2010
Order:  Sacoglossa  von Ihering, 1876
Suborder:  Oxynoacea  Odhner, 1939
Superfamily:  Oxynooidea  Stoliczka, 1868 (1847)
Family: Oxynoidae  Stoliczka, 1868 (1847)

Lobiger serradifalci

Oxynoe olivacea

Family:  Volvatellidae  Pilsbry, 1895

Ascobulla fragilis

Suborder:  Plakobranchacea  Jensen, 1996
Superfamily:  Limapontioidea  J.E. Gray, 1847
Family:  Caliphyllidae  Tiberi, 1881

Caliphylla mediterranea

Cyerce cristallina

Cyerce graeca

Polybranchia viridis

Family:  Hermaeidae  H. Adams & A. Adams, 1854

Hermaea bifida

Hermaea cantabra

Hermaea paucicirra

Hermaea variopicta

Family:  Limapontiidae  J.E. Gray, 1847

Calliopaea bellula	Ercolania coerulea	Ercolania viridis	Placida cremoniana	Placida dendritica
Placida verticillata

Superfamily:  Plakobranchoidea  J.E. Gray, 1840
Family:  Boselliidae  Ev. Marcus, 1982

Bosellia mimetica

Family:  Plakobranchidae  J.E. Gray, 1840

Elysia flava	Elysia gordanae	Elysia margaritae	Elysia ornata	Elysia sp. 01
Elysia sp. 02	Elysia timida	Elysia cf. tomentosa C	Elysia translucens	Elysia viridis
Thuridilla hopei