†superfamily Cylichnoidea Adams 1850 (snail)
Gastropoda - Opisthobranchiata
Alternative spelling: Cylichnacea
Parent taxon: Cephalaspidea according to P. Bouchet et al. 2017
See also Squires 1984 and Squires 1987
Sister taxa: Acteonoida, Bulloidea, Cylindrobulloidea, Haminoeoidea, Notodiaphanidae, Philinoidea, Ringiculoidea, Runcinoidea
Subtaxa: none
Ecology: epifaunal omnivore
Distribution: there are no occurrences of Cylichnoidea in the database