Planorbis

Planorbis
Temporal range: Jurassic–recent
Drawing of a shell of Planorbis planorbis
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superorder: Hygrophila
Family: Planorbidae
Subfamily: Planorbinae
Tribe: Planorbini
Genus: Planorbis
O. F. Müller, 1774
Species

See text

Synonyms

Tropidiscus Stein, 1850

Planorbis is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.

Description

Planorbis shells are flat-coiled and sinistral.

Distribution

This genus has a worldwide distribution. It is known from the Jurassic to the Recent periods.

Human Uses

Species in the genus Planorbis have long been used in the aquarium trade, with references going back as far as 1921.

Species

Extant species currently in Planorbis
Fossil species (selection)
Suggenera and species brought into synonymy

References

  1. ↑ Müller O. F. (1773). Vermivm terrestrium et fluviatilium, seu animalium infusoriorum, helminthicorum et testaceorum, non marinorum, succincta historia. Voluminis Imi pars Ima. pp. [1-33], 1-135. Havniae & Lipsiae. (Heineck & Faber).
  2. 1 2 3 M. Vinarski (2023). "Planorbis O. F. Müller, 1773". WoRMS. World Register of Marine Species. Retrieved 7 August 2025.
  3. ↑ (in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: Základy zoopaleontologie. - Olomouc, 1996. 264 pp., ISBN 80-7067-599-3.
  4. ↑ Innes, William T. (1921). Goldfish Varieties and Tropical Aquarium Fishes: A Complete Guide to Aquaria and Related Subjects. Philadelphia: Innes & Sons. pp. 13–14. doi:10.5962/bhl.title.57180. OCLC 1102159.

Further reading