Ancylus

For a prehistoric state of the Baltic Sea, see Ancylus Lake.

Ancylus is a 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.^[2]

Ancylus Temporal range: Cenozoic PreꞒ Ꞓ O S D C P T J K Pg N
Ancylus fluviatilis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Family:	Planorbidae
Subfamily:	Ancylinae
Tribe:	Ancylini
Genus:	Ancylus O. F. Müller, 1773[1]
Species
See text
Synonyms
Ancilus O.F. Müller, 1773 (a misspelling of the generic name Ancylus) Pseudancylus Walker, 1921 (junior objective synonym of Ancylus) Velletia (Ancylus) O. F. Müller, 1773 (new combination)

The genus is known throughout the Cenozoic.^[3]

Species

Species in the genus Ancylus include:

• Ancylus aduncus A. A. Gould, 1847^[4]
• † Ancylus alutae Jekelius, 1932
• Ancylus ashangiensis Brown, 1965^[5]
• Ancylus benoitianus Bourguignat, 1862
• † Ancylus bourgeoisi Deshayes, 1863
• † Ancylus boyeri Noulet, 1867
• † Ancylus braunii Dunker, 1853
• Ancylus capuloides Jan in Porro, 1838
• † Ancylus cestasensis Peyrot, 1932
• † Ancylus depressus Deshayes, 1824
• † Ancylus dumasi Fontannes, 1884
• † Ancylus elegans J. de C. Sowerby, 1826
• Ancylus expansilabris Clessin, 1881
• Ancylus fluviatilis Müller, 1774^[6] - the type species^[4]
• † Ancylus hungaricus Brusina, 1902
• Ancylus lapicidus Hubendick, 1960^[6][4]
• † Ancylus lyelli Maillard, 1892
• † Ancylus moravicus Rzehak, 1893
• † Ancylus ninghaiensis Youluo, 1978
• † Ancylus parmophorus de Stefani, 1880
• Ancylus pileolus^[6]
• Ancylus recurvus Martens, 1873
• Ancylus regularis Brown, 1973^[7]
• Ancylus rupicola Boubée, 1832^[6]
• † Ancylus saucatsensis Peyrot, 1932 (?)
• Ancylus scalariformis Stankovic & Radoman, 1953^[6][4]
• † Ancylus serbicus Brusina, 1893
• Ancylus striatus Quoy & Gaimard, 1834^[4]
• Ancylus subcircularis Clessin, 1880
• † Ancylus subcostatus Benoist, 1873
• Ancylus tapirulus Polinski, 1929^[6][4]

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)

Cladogram

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):^[6]

Ancylus	Ancylus sp. C Ancylus sp. D Ancylus tapirulus Ancylus lapicidus Ancylus scalariformis Ancylus sp. B Ancylus sp. A Ancylus fluviatilis