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For a prehistoric state of the Baltic Sea, see Ancylus Lake.
Temporal range: Cenozoic
AF 40002 D Ancylus fluviatilis b.jpg
Ancylus fluviatilis
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Hygrophila
Superfamily: Planorboidea
Family: Planorbidae
Subfamily: Planorbinae
Tribe: Ancylini
Genus: Ancylus
O. F. Müller, 1773[1]

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.

The genus is known throughout the Cenozoic.[2]


Species in the genus Ancylus include:


  • Ancylus gussonii O. G. Costa, 1829 is a synonym of Williamia gussonii (O. G. Costa, 1829)


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):[5]


Ancylus sp. C

Ancylus sp. D

Ancylus tapirulus

Ancylus lapicidus

Ancylus scalariformis

Ancylus sp. B

Ancylus sp. A

Ancylus fluviatilis


  1. ^ Müller O. F. (1773). Vermivm terrestrium et fluviatilium, seu animalium infusoriorum, helminthicorum, et testaceorum, non marinorum, succincta historia. Volumen alterum. - pp. I-XXVI [= 1-36], 1-214, [1-10]. Havniae & Lipsiae. (Heineck & Faber). (1774)
  2. ^ (Czech) Pek I., Vašíček Z., Roček Z., Hajn V. & Mikuláš R. (1996): Základy zoopaleontologie. Olomouc, 264 pp., ISBN 80-7067-599-3.
  3. ^ a b c d e f "Species in genus Ancylus (n=6)". AnimalBase, accessed 7 July 2012.
  4. ^ Van Damme D. (2010). Ancylus ashangiensis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. <>. Downloaded on 7 July 2012.
  5. ^ a b c d e f g Albrecht C., Trajanovski S., Kuhn K., Streit B. & Wilke T. (2006). "Rapid evolution of an ancient lake species flock: Freshwater limpets (Gastropoda: Ancylidae) in the Balkan Lake Ohrid". Organisms Diversity & Evolution 6(4): 294-307. doi:10.1016/j.ode.2005.12.003.
  6. ^ Van Damme D. (2010). Ancylus regularis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. <>. Downloaded on 7 July 2012.

Further reading[edit]