Alternative spelling: Trochacea
Parent taxon: Vetigastropoda according to P. J. Wagner 2017
See also Beesley 1998, Beu et al. 1990, Bouchet et al. 2005, Ferrari 2014, Harzhauser 2004, Harzhauser 2007, Knight et al. 1960, Lozouet et al. 2001, Nützel and Ketwetsuriya 2016, Ponder and Lindberg 1997, Todd 2001 and Ward and Blackwelder 1987
Sister taxa: Amberleyoidea, Angarioidea, Blodgettella, Cirroidea, Crosseolidae, Fissurelloidea, Frydatinus, Haliotoidea, Jurassiphorus, Lepetelloidea, Lepetodriloidea, Microdomatoidea, Neomphaloidea, Nodoconus, Pendromidae, Pleurotomariida, Ptychomphaloidea, Purkynespira, Schizogonioidea, Scissurelloidea, Seguenzioidea, Selenimorpha, Trochina, Turbinoidea
Subtaxa: Araeonematidae Ataphridae Calliostomatidae Eucochlidae Fossarinidae Liotiidae Proconulidae Strianematina Tegulidae Trochidae Ueckerconulus Velainellidae
Type: Trochus
Ecology: epifaunal grazer