"Mollusks of the genus Theodoxus (Gastropoda, Pectinibranchia, Neritidae) from the Black and the Azov seas basin". Vestnik Zoologii 33: 11-19. Theodoxus heldreichi (Martens, 1879) Theodoxus hispalensis (Martens, 1879) Theodoxus meridionalis (Philippi, 1836) Theodoxus pallasi Lindholm, 1924 Theodoxus prevostianus (Pfeiffer, 1828) Theodoxus saulcyi (Bourguignat, 1852) Theodoxus subthermalis (Issel, 1865) Theodoxus transversalis (Pfeiffer, 1828) Theodoxus valentinus(Graells, 1846) Theodoxus anatolicus (Récluz, 1841) Theodoxus niloticus (Reeve, 1856) - synonim: Theodoxus africanus (Reeve, 1856) Theodoxus subterrelictus Schütt, 1963 Theodoxus varius (Menke, 1828) Theodoxus astrachanicus Starobogatov, 1994Kantor Yu I., Vinarski M. V., Schileyko A. A. & Sysoev A. V. 2010. "Catalogue of the continental mollusks of Russia and adjacent territories". Ruthenica, Version 2.3.1. Theodoxus danasteri (Lindholm, 1908) Theodoxus marteli (Pallary, 1920) Theodoxus milachevitchi Golikov & Starobogatov, 1966 Theodoxus numidicus (Récluz, 1841) Theodoxus pilidei (Tournouêr, 1879) Theodoxus sarmaticus (Lindholm, 1901) Theodoxus schultzii (Grimm, 1877)Zettler M. L. 2007. "A redescription of Theodoxus schultzii (Grimm, 1877), an endemic neritid gastropod of the Caspian Sea". Journal of Conchology 39(3): 245-252.