Halistylus Dall 1890 (top snail)
Gastropoda - Trochoidea - Trochidae
Parent taxon: Halistylinae according to P. Bouchet et al. 2005
Sister taxa: Botelloides, Charisma
Subtaxa: Halistylus columna
Ecology: epifaunal grazer
Gastropoda - Trochoidea - Trochidae
Parent taxon: Halistylinae according to P. Bouchet et al. 2005
Sister taxa: Botelloides, Charisma
Subtaxa: Halistylus columna
Ecology: epifaunal grazer