Alternative spellings: Epitoniacea, Epitonidacea
Synonym: Janthinoidea Lamarck 1810
Parent taxon: Caenogastropoda according to C. S. Cataldo 2017
See also Allison 1955, Beesley 1998, Bouchet et al. 2005, Bouchet et al. 2017, Duerr 2004, Hickman 1980, Ponder and Warén 1988, Schnetler et al. 2024, Sohl 1964, Sohl 1964, Squires 1984, Squires and Saul 2003, Todd 2001 and Ward and Blackwelder 1987
Sister taxa: Architaenioglossa, Carinomphalus, Cassianozyga, Cataldia, Cerithiacea, Cerithimorpha, Cerithioidea, Coelodiscidae, Cyclophoracea, Dzikella, Epitoniidae, Idahospira, Loxotomella, Meekospiridae, Mesogastropoda, Naticoidea, Neontaenioglossa, Neotaenioglossa, Orthonematoidea, Peruneloidea, Perunelomorpha, Pragoscutulidae, Prisconatica, Pseudomelanoidea, Soleniscoidea, Sorbeoconcha, Strobeidae, Trinema, Triphoroidea, Vanikoroidea, Ventrosia, Zygopleuroidea
Subtaxa: Epitoniidae
Ecology: epifaunal carnivore