Английская Википедия:Bigtooth river stingray

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The bigtooth river stingray or Tocantins River ray (Potamotrygon henlei) is a species of freshwater fish in the family Potamotrygonidae.[1] It is endemic to the lower Tocantins basin and Araguaia basin in Brazil,[2] and prefers muddy bottoms.[3] It is sometimes kept in aquaria.[3] This stingray is generally common and its population increased after the Tucuruí Dam was completed, unlike many other species in its range.[3]

Appearance and relatives

P. henlei reaches up to Шаблон:Convert in disc width and Шаблон:Convert in total length.[3] It is replaced by the closely related P. rex in the mid and upper Tocantins basin, but that species has concentrically clustered yellow-orange spots.[2] Two other close relatives where the spots are yellowish-white (as in P. henlei) are found in other Brazilian rivers: P. leopoldi from the Xingu River basin and P. albimaculata from the Tapajós River basin.[4] Compared to P. leopoldi, P. henlei is duller above, appearing blackish or dark gray-brown (as opposed to deeper black in P. leopoldi), and its underparts have a large white center and broad brownish-dusky edges (underparts mostly brownish-dusky in P. leopoldi).[4][5] Compared to P. albimaculata, P. henlei has larger yellowish-white spots above.[4][5]

British Scientist and Angler , Jeremy Wade[6] once hauled out a Bigtooth River Ray from a boat , The Stingray had a black body with yellow isolated spots around the disc. Brown blotched specimens of P. Henlei are also recorded.

References

Шаблон:Reflist

External links

Шаблон:Commons category

Шаблон:Taxonbar


Шаблон:Rajiformes-stub

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  1. ↑ Шаблон:FishBase
  2. ↑ 2,0 2,1 Carvalho, M.R.d. (2016): Potamotrygon rex, a new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the middle and upper rio Tocantins, Brazil, closely allied to Potamotrygon henlei (Castelnau, 1855). Zootaxa, 4150 (5): 537–565.
  3. ↑ 3,0 3,1 3,2 3,3 Ошибка цитирования Неверный тег <ref>; для сносок iucn не указан текст
  4. ↑ 4,0 4,1 4,2 Carvalho, M.R.d. (2016): Description of two extraordinary new species of freshwater stingrays of the genus Potamotrygon endemic to the rio Tapajós basin, Brazil (Chondrichthyes: Potamotrygonidae), with notes on other Tapajós stingrays. Zootaxa, 4167 (1): 1–63.
  5. ↑ 5,0 5,1 Шаблон:Citation
  6. ↑ Шаблон:Citation
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