Family Cylichnidae Adams 1850 (snail)
Parent taxon: Philinoidea according to J. A. Todd 2001
Sister taxa: Aglajidae, Gastropteridae, Philinidae, Philinoglossidae, Retusidae, Scaphandridae
Subtaxa: Abderospira, Acteocina, Bullaria, Bullichna, Cylichna, Cylichnania, Cylichnella, Philine, Scaphander, Suwannescapha
Ecology: epifaunal carnivore