Cyclostoma

Cyclostoma is an obsolete genus name of operculate snails with circular aperture.

This genus has become a synonym of Epitonium Röding, 1798

Species brought into synonymy

 * Cyclostoma scalare (Linnaeus, 1758) (type species): synonym of Turbo scalaris Linnaeus, 1758 (original name), synonym of Epitonium scalare (Linnaeus, 1758)
 * Cyclostoma elegans (O.F. Müller 1774) : synonym of Nerita elegans O.F. Müller 1774 (original name), synonym of Pomatias elegans (O.F. Müller 1774)
 * Cyclostoma acutum Draparnaud, 1805 : synonym of Hydrobia acuta acuta (Draparnaud, 1805)
 * Cyclostoma breve Draparnaud, 1805 : synonym of Avenionia brevis (Draparnaud, 1805)
 * Cyclostoma cincinnatiensis I. Lea, 1840 : synonym of Pomatiopsis cincinnatiensis (I. Lea, 1840)
 * Cyclostoma concinnum Scacchi, 1836 : synonym of Truncatella subcylindrica (Linnaeus, 1767)
 * Cyclostoma costulatum Rossmässler, 1837 : synonym of Pomatias rivularis (Eichwald, 1829)
 * Cyclostoma delicatum Philippi, 1844 : synonym of Torellia delicata (Philippi, 1844)
 * Cyclostoma gibbum Draparnaud, 1805 : synonym of † Belgrandia gibba (Draparnaud, 1805)
 * Cyclostoma lapidaria Say, 1817 : synonym of Pomatiopsis lapidaria (Say, 1817)
 * Cyclostoma marginatum Say, 1821 : synonym of Pupoides albilabris (C. B. Adams, 1841)
 * † Cyclostoma rubeschi Reuss in Reuss & Meyer, 1849 : synonym of † Staadtiellopsis rubeschi (Reuss in Reuss & Meyer, 1849)
 * Cyclostoma subdisjuncta H. Adams, 1868 : synonym of Tubiola subdisjuncta (H. Adams, 1868)
 * Cyclostoma truncatulum Draparnaud, 1801 : synonym of Truncatella subcylindrica (Linnaeus, 1767)