Gastropoda - Cephalaspidea

Alternative spelling: Cephalospidea

Parent taxon: Opisthobranchia according to P. J. Wagner 2011

Sister taxa: Acanthotrophia, Acochlidea, Anaspidea, Bullinidae, Buscotypus, Canepina, Cephalaspida, Cylindrobullinoidea, Echininus, Floribella, Gymnosomata, Heteroptygmatis, Heterostrophia, Kotakaia, Lutima, Mariottia, Mistostigma, Nicosiaella, Notaspidea, Nudibranchia, Pseudofusia, Reticulacella, Rhodopemorpha, Sacoglossa, Scorbinidola, Tectibranchiata, Thecosomata, Umbraculomorpha

Subtaxa: Acteonoida, Acteonoidea, Bulloidea, Cylindrobulloidea, Diaphanoidea, Haminoeoidea, Notodiaphanidae, Philinoidea, Ringiculoidea, Runcinoidea

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Ecology: epifaunal omnivore