Subfamily Halistylinae Keen 1958 (top snail)
Gastropoda - Trochoidea - Trochidae
Parent taxon: Trochidae according to P. Bouchet et al. 2005
Sister taxa: Antisolarium, Calliostomatinae, Calliotrochus, Chuelskia, Cittarium, Coeloconulus, Coralastele, Enida, Eucyclinae, Francisciconcha, Gena, Granulifera, Hybochelus, Karabolkia, Lirulariinae, Livona, Margarella, Margaritinae, Microgaza, Monodontinae, Pachypoma, Parvitomella, Prothalotia, Solariconulus, Solariellinae, Stomatellinae, Suavotrochus, Synaptocochlea, Tegulinae, Thalotia, Trochaclididae, Trochaclis, Trochinae, Trochus, Turcicula, Umboniinae, Vacekia, Stomatiinae
Subtaxa: Botelloides, Charisma, Halistylus
Type: Halistylus
Ecology: epifaunal grazer