Gastropoda - Gymnosomata

Parent taxon: Opisthobranchia according to P. L. Beesley 1998

Sister taxa: Acanthotrophia, Acochlidea, Akeridae, Buscotypus, Canepina, Cephalaspida, Cephalaspidea, Cylindrobullinoidea, Floribella, Heteroptygmatis, Heterostrophia, Lutima, Mariottia, Mistostigma, Nicosiaella, Notaspidea, Paronaella, Pseudofusia, Reticulacella, Rhodopemorpha, Scorbinidola, Tectibranchia, Thecosomata, Umbraculomorpha

Subtaxa: Gymnoptera

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Ecology: epifaunal

Distribution: found only at Cabanes reef, Saint-Paul-les-Dax, Adour Valley, Landes (Miocene of France)

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