Planaria

Planaria
Planaria torva
Scientific classification
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Rhabditophora
Order: Tricladida
Suborder: Continenticola
Family: Planariidae
Genus: Planaria
OF Müller, 1776
Species: P. torva
Binomial name
Planaria torva
(OF Müller, 1773)
Synonyms
  • Fasciola torva OF Müller, 1773
  • Dendroplanaria torva Komárek, 1926
  • Planaria torfrida Perkins, 1928

Planaria is a genus of planarians in the family Planariidae. It is currently represented by a single species, Planaria torva,[1] which is found in Europe.[2] When Planaria is cut into pieces, each piece has the ability to regenerate into a fully formed individual.[3]

Description

Currently the genus Planaria is defined as freshwater triclads with oviducts that unite to form a common oviduct without embracing the bursa copulatrix and with an adenodactyl present in the male atrium. The testes occur along the whole body.[4]

Diet

The food of P. torva consists of freshwater gastropods, tubificid worms, and freshwater arthropods, such as isopods of the genus Asellus and chironomid larvae, although it shows a clear preference for snails.[5] In the United Kingdom, P. torva is a successful predator of the invasive New Zealand mud snail (P. jenkinsi).[6]

References

  1. ↑ Ball, Ian; Reynoldson, T. B. (1981). British Planarians. Platyhelminthes: Tricladida. Keys and notes for the identification of the species (Synopses of the British Fauna). Cambridge University Press. p. 141. doi:10.1002/iroh.19830680211.
  2. ↑ Turbellarian Taxonomic Database: Distribution of Planaria torva. Access on 21 April 2016.
  3. ↑ "Unravelling How Planaria Regenerate". Sedeer el-Showk. Retrieved 26 January 2017.
  4. ↑ Ball, Ian R.; Reynoldson, T. B.; Warwick, T. (2009). "The taxonomy, habitat and distribution of the freshwater triclad Planaria torva (Platyhelminthes: Turbellaria) in Britain". Journal of Zoology. 157 (1): 99–123. ISSN 0952-8369. doi:10.1111/j.1469-7998.1969.tb01691.x.
  5. ↑ Reynoldson, T. B.; Sefton, A. D. (1976). "The food of Planaria torva (Müller) (Turbellaria-Tricladida), a laboratory and field study". Freshwater Biology. 6 (4): 383–393. ISSN 0046-5070. doi:10.1111/j.1365-2427.1976.tb01623.x.
  6. ↑ Reynoldson, T. B.; Piearce, Bronwen (1979). "Predation on snails by three species of triclad and its bearing on the distribution of Planaria torva in Britain". Journal of Zoology. 189 (4): 459–484. ISSN 0952-8369. doi:10.1111/j.1469-7998.1979.tb03974.x.
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