†Semizona Ebbestad and Peel 2001 (snail)
Gastropoda - Murchisoniina - Eotomariidae
Full reference: J.O.R. Ebbestad and J. S. Peel. 2001. An unusual trochiform gastropod from the Upper Ordovician of Sweden. Palaeontology 44(2):375-387
Parent taxon: Eotomariidae according to P. J. Wagner 2011
Sister taxa: Eotomariinae, Kamupena, Liospirinae, Paraliospira, Turritoma
Subtaxa: Semizona bella, Semizona glindmeyeri
Ecology: facultatively mobile epifaunal suspension feeder