Overview

Distribution

Bergumermeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: Vegetation
Salin: freshwater
Comments: West shore, stones (bricks). Vegetation, Phragmites, little detritus. 31-100 individuals per hour.

Bergumermeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: Stones
Salin: freshwater
Comments: West shore, stones (bricks). Vegetation, Phragmites, little detritus. 101-300 individuals per hour.

Brandemeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: Vegetation
Salin: freshwater
Comments: West shore. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

De Leijen Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: Vegetation
Salin: freshwater
Comments: North shore. Bricks, rough stones. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

De Leijen Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: Bricks, rough stones
Salin: freshwater
Comments: North shore. Bricks, rough stones. Vegetation, Phragmites, little detritus. 101-300 individuals per hour.

Fluessen Lake (De Fluesen, De Fluessen, Fluessenmeer, Fljusen), Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: broken bricks
Salin: freshwater
Comments: West shore. Broken bricks. Vegetation, Phragmites, Typha, little detritus. 31-100 individuals per hour.

Fluessen Lake (De Fluesen, De Fluessen, Fluessenmeer, Fljusen), Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: West shore. Broken bricks. Vegetation, Phragmites, Typha, little detritus. 1-10 individuals per hour.

Koevorde (Koevordermeer) Lake, Netherlands
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: North shore. Bricks. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

Koevorde (Koevordermeer) Lake, Netherlands
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: bricks
Salin: freshwater
Comments: North shore. Bricks. Vegetation, Phragmites, little detritus. 11-30 individuals per hour.

Langweerderwielen (Langweerder Wielen) Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: South-east shore. Vegetation, Phragmites, a little Typha, little detritus. 11-30 individuals per hour.

Morra Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: East shore. Bricks. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

Morra Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: bricks
Salin: freshwater
Comments: East shore. Bricks. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

Oorden Lake (De Oorden), Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: South-east shore. Broken concrete. Vegetation, Phragmites, a little Typha, little detritus. 11-30 individuals per hour.

Oorden Lake (De Oorden), Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: broken concrete
Salin: freshwater
Comments: South-east shore. Broken concrete. Vegetation, Phragmites, a little Typha, little detritus. 31-100 individuals per hour.

Pikmeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: South shore. Rounded. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

Pikmeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: rounded stones
Salin: freshwater
Comments: South shore. Rounded stones. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

Prinsenhof Lake, Netherlands
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: bricks
Salin: freshwater
Comments: South-east shore. Bricks. Vegetation, Phragmites, little detritus. 11-30 individuals per hour.

Slotermeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: bricks, rough stones
Salin: freshwater
Comments: North shore. Bricks, rough stones. Vegetation, Phragmites, little detritus. 1-10 individuals per hour.

Sneekermeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: West shore. Broken bricks. Vegetation, Phragmites, little Scirpus, little detritus. 1-10 individuals per hour.

Sneekermeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: broken bricks.
Salin: freshwater
Comments: West shore. Broken bricks. Vegetation, Phragmites, little Scirpus, little detritus. 31-100 individuals per hour.

Tjeukemeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: broken bricks
Salin: freshwater
Comments: South shore. Broken bricks. Vegetation, Phragmites, medium detritus. 31-100 individuals per hour.

Tjeukemeer Lake, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: South shore. Broken bricks. Vegetation, Phragmites, medium detritus. 11-30 individuals per hour.

Wijde Ee Lake, De Veenhoop, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: North shore. Vegetation, Typha, little Scirpus, thick detritus. 11-30 individuals per hour.

Wijde of Peanster Ee, Netherlands (Holland)
Collection date: Jun 7-12, 1971
Depth: littoral
Substrate: vegetation
Salin: freshwater
Comments: North shore. Vegetation, Phragmites, little Typha, little detritus. 1-10 individuals per hour.

People’s Democratic Republic of Algeria (Al-Jaza’ir, L’Etat Algerien, Algérie), Africa
Collection date: 1923 or earlier
Salin: freshwater

Herault, France
Collection date: 2004 or earlier
Salin: freshwater

Wales, United Kingdom
Collection date: 1981 or earlier
Comments: fairly widespread, occurring in England, Scotland and Wales.

Scotland (Schottland), United Kingdom
Collection date: 1981 or earlier
Comments: fairly widespread, occurring in England, Scotland and Wales.

England, United Kingdom
Collection date: 1981 or earlier
Comments: fairly widespread, occurring in England, Scotland and Wales.
  • Ball IR, Reynoldson RB. 1981.   . British Planarians. Platyhelminthes: Tricladida. Cambridge Univ. Press. pp. 1-141.
  • Gauthier H. 1923.   . Observations sur quelques Planaires d'Algerie. Bull Soc Hist Nat d Afrique du Nord 14:30-34.
  • Young JO. 1972.   . The Turbellaria of some Friesland lakes with incidental records of Gasteropoda [sic] and Hirudinea. Zoologische Bijdragen 13: 59-70.
  • Vila M, Sancho M, Cardona A, Fernandez J, Romero R. 2004.  abstract/note. New sexual population of Girardia tigrina (GIRARD, 1850) KENK, 1974 (Platyhelminthes, Turbellaria, Tricladida, Dugesidae), in southern France. Boletin de la Real Sociedad Espanola de Historia Natural Seccion Biologica 99(1-4): 49-53.
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© National Science Foundation - Turbellarian Taxonomic Database

Source: Turbellarian Taxonomic Database

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Ecology

Habitat

Schmidtea polychroa inhabits shallow waters of lakes and rivers.

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© Solà, Eduard

Source: Continenticola

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Life History and Behavior

Reproduction

S. polychroa is the only species of the genus Schmidtea with amphimictic diploid and/or parthenogenetic polyploid populations.

Sexual populations lay cocoons between 10ºC and 23-25ºC.

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Source: Continenticola

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Wikipedia

Schmidtea polychroa

Schmidtea polychroa is a species of freshwater flatworm, a dugesiid triclad that inhabits the shallow mesotrophic or eutrophic waters of rivers and lakes of Europe. It is also present in North America, where it has been introduced at least in the Saint Lawrence river system.[1][2] It is an animal with a limited dispersion capability.[3]

Diet[edit]

Individuals of this species search for food actively; they feed mainly on small invertebrates.[4] They prey preferably on oligochaetes, and also on gastropods.[1]

Reproduction[edit]

They are hermaphroditic. Schmidtea polychroa produces cocoons in water temperatures between 10 and 23 °C.[5]

References[edit]

  1. ^ a b Boddington, M. J.; Mettrick, D. F. (1974). "The distribution, abundance, feeding habits, and population biology of the immigrant triclad Dugesia polychroa (Platyhelminthes: Turbellaria) in Toronto Harbour, Canada". Journal of Animal Ecology 43 (3): 681–699. doi:10.2307/3531.  edit
  2. ^ Kenk, R. (1989). Revised list of the North American freshwater Planarians (Platyhelminthes. Smithsonian Contributions to Zoology 476, 1-10.
  3. ^ Pongratz, N.; Gerace, L.; Michiels, N. K. (2002). "Genetic differentiation within and between populations of a hermaphroditic freshwater planarian". Heredity 89 (1): 64–69. doi:10.1038/sj.hdy.6800102. PMID 12080371.  edit
  4. ^ Calow, P.; Davidson, A. F.; Woollhead, A. S. (1981). "Life-cycle and feeding strategies of freshwater triclads: A synthesis". Journal of Zoology 193 (2): 215–237. doi:10.1111/j.1469-7998.1981.tb03441.x.  edit
  5. ^ Reynoldson, T. B.; Young, J. O.; Taylor, M. C. (1965). "The Effect of Temperature on the Life-Cycle of Four Species of Lake-Dwelling Triclads". Journal of Animal Ecology 34 (1): 23–43. doi:10.2307/2367.  edit
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