Superfamily Seguenzioidea Verril 1884 (snail)
Synonym: Eucycloidea Koken 1897
Parent taxon: Vetigastropoda according to C. S. Cataldo 2017
See also Bandel 2010, Beesley 1998, Bouchet et al. 2005, Bouchet et al. 2017, Ferrari 2014, Ferrari et al. 2014 and Todd 2001
Sister taxa: Amberleyoidea, Angarioidea, Blodgettella, Cirroidea, Crosseolidae, Frydatinus, Jurassiphorus, Lepetellida, Microdomatoidea, Nodoconus, Pendromidae, Pleurotomariida, Pleurotomarioidea, Ptychomphaloidea, Purkynespira, Schizogonioidea, Seguenziida, Selenimorpha, Trochina, Trochoidea, Turbinoidea
Subtaxa: Adeuomphalus Ancistrobasidae Chilodontaidae Eucyclidae Eucycloidea galaczi Eucycloscalidae Eunemopsidae Laubellidae Pagodatrochidae Pseudoturcicidae Sabrinellidae Seguenziidae
Type: Seguenzia
Ecology: epifaunal grazer