Ancylus genus of very small, freshwater, air-breathing limpets. They are aquatic pulmonate gastropod mollusks in the tribe Ancylini within the family Planorbidae , the ram's horn snails and their allies.
The genus is known throughout the Cenozoic .
Species in the genus Ancylus include:
Ancylus aduncus A. A. Gould, 1847 † Ancylus alutae Jekelius, 1932 Ancylus ashangiensis Brown, 1965 † Ancylus bourgeoisi Deshayes, 1863 † Ancylus cestasensis Peyrot, 1932 † Ancylus depressus Deshayes, 1824 Ancylus fluviatilis Müller, 1774 - the type species † Ancylus hungaricus Brusina, 1902 Ancylus lapicidus Hubendick, 1960 † Ancylus moravicus Rzehak, 1893 † Ancylus parmophorus de Stefani, 1880 Ancylus pileolus Ancylus recurvus Martens, 1873 Ancylus regularis Brown, 1973 Ancylus rupicola Boubée, 1832 † Ancylus saucatsensis Peyrot, 1932 (?) Ancylus scalariformis Stankovic & Radoman, 1953 † Ancylus serbicus Brusina, 1893 Ancylus striatus Quoy & Gaimard, 1834 † Ancylus subcostatus Benoist, 1873 Ancylus tapirulus Polinski, 1929 Synonyms † Ancylus croaticus Brusina, 1902 : synonym of † Acroloxus croaticus (Brusina, 1902) † Ancylus decussatus Reuss in Reuss & Meyer, 1849 : synonym of †Acroloxus decussatus (Reuss in Reuss & Meyer, 1849) † Ancylus deperditolacustris Gottschick, 1911 : synonym of † Acroloxus deperditolacustris (Gottschick, 1911) † Ancylus deperditus (Desmarest, 1814) : synonym of † Ferrissia deperdita (Desmarest, 1814) Ancylus drouetianus Bourguignat, 1862 : synonym of Williamia gussoni (Costa O. G., 1829) Ancylus fuscus C. B. Adams, 1840 : synonym of Laevapex fuscus (C. B. Adams, 1840) Ancylus gibbosus Bourguignat, 1862 : synonym of Williamia gussoni (Costa O. G., 1829) Ancylus gussonii O. G. Costa, 1829 : synonym of Williamia gussonii (O. G. Costa, 1829) † Ancylus illyricus Neumayr, 1880 : synonym of †Ferrissia illyrica (Neumayr, 1880) † Ancylus involutus Pavlović, 1903 : synonym of † Acroloxus involutus (Pavlović, 1903) † Ancylus michaudi Locard, 1878 : synonym of † Acroloxus michaudi (Locard, 1878) † Ancylus neumayri Fontannes, 1881 : synonym of †Ferrissia neumayri (Fontannes, 1881) Ancylus patelloides I. Lea, 1856 : synonym of Lanx patelloides (I. Lea, 1856) † Ancylus pontileviensis Morgan, 1920 : synonym of † Ferrissia pontileviensis (Morgan, 1920) † Ancylus wittmanni Schlickum, 1964 : synonym of † Ferrissia wittmanni (Schlickum, 1964)
A cladogram based on sequences of mitochondrial 16S ribosomal RNA and cytochrome-c oxidase I (COI) genes showing phylogenic relations of Ancylus by Albrecht et al. (2006):
