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

Class : Gastropoda  Cuvier, 1797
Subclass:  Heterobranchia  J.E. Gray, 1840
informal group:  Lower Heterobranchia (Allogastropoda)  Haszprunar, 1985
according to Bouchet & Rocroi (2005) is the superfamily Acteonoidea no more in the Order Cephalaspidea

Superfamily:  Acteonoidea  d'Orbigny, 1843
Family:  Aplustridae  J.E. Gray, 1847

Micromelo scriptus

Class:  Gastropoda  Cuvier, 1797
Subclass:  Heterobranchia  J.E. Gray, 1840
Clade:  Euthyneura Spengel, 1881
Superorder:  Euopisthobranchia  Jörger et al., 2010
Order:  Cephalaspidea  P. Fischer, 1883
Superfamily:  Bulloidea  J.E. Gray, 1827
Family:  Bullidae  J.E. Gray, 1827

Bulla peasiana

Superfamily: Haminoeoidea Pilsbry, 1895
Family: Haminoeidae  Pilsbry, 1895

Diniatys dubius

Lamprohaminoea cymbalum

Superfamily:  Philinoidea  Gray, 1850
Family:  Aglajidae  Pilsbry, 1895 (1847)

Chelidonura alisonae

Chelidonura hirundinina

Philinopsis speciosa

Family:  Gastropteridae  Swainson, 1840

Sagaminopteron psychedelicum

Siphopteron quadrispinosum



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