Planorbis planorbis

Planorbis planorbis is a species of air-breathing freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails.[3]

Planorbis planorbis
A shell of Planorbis planorbis

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Hygrophila
Superfamily:
Planorboidea
Family:
Planorbidae
Subfamily:
Planorbinae
Tribe:
Planorbini
Genus:
Planorbis
Subgenus:
Planorbis
Species:
P. planorbis
Binomial name
Planorbis planorbis
(Linnaeus, 1758)[2]
Synonyms[3]
  • † Planorbis (Anisus) umbilicatus (Müller, 1773)
  • † Planorbis planorbis planorbis (Linnaeus, 1758) (no subspecies for P. planorbis)
  • Planorbis umbilicatus (Müller, 1773)

Distribution

Description
Drawing of the shell of Planorbis planorbis.
Upper image: Lateral view showing the profile of the shell.
Lower image: Umbilical view; this side is carried uppermost in the living snail.

This species, like all planorbids, has a sinistral shell. The width of the shell is 15 – 20 mm. The keel on the periphery of the shell is near the edge closest to the spire side, which is carried downwards in life.

Ecology

The habitat of this species is shallow standing and slowly running freshwaters on a mud substrate, also ponds and temporarily drying flood waters, up to 1 metre depth. Planorbis planorbis does not tolerate intensive water movements but is tolerant to eutrophic conditions.

gollark: Do we *need* "ecosystems"? *Really*?
gollark: People do *tend* to focus on relatively insignificant bad things and ignore stuff mostly being fine and getting better.
gollark: So surely a murderer should be able to catch all lesser criminals.
gollark: There's that saying about how you set thieves to catch thieves.
gollark: Æ is no mere ligature. It is the ash symbol. Apioid.

References
  1. Seddon M. B. & Van Damme D. (2014). "Planorbis planorbis". The IUCN Red List of Threatened Species. Version 2014.3. <http://www.iucnredlist.org>. Downloaded on 09 February 2015.
  2. Linnaeus, C. 1758. Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. 10th edition. - Vermes. Testacea: 700-781. Holmiae. (Salvius).
  3. Neubauer, Thomas A. (2014). Planorbis (Planorbis) planorbis (Linnaeus, 1758). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=822236 on 2014-11-23
  4. (in Czech) Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF.
  5. Juřičková L., Horsák M. & Beran L. (2001). "Check-list of the molluscs (Mollusca) of the Czech Republic". Acta Soc. Zool. Bohem. 65: 25-40.
  6. (in Dutch) Planorbis planorbis — Anemoon
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