| 词条 | Xingu River ray |
| 释义 |
| name = Xingu River ray | image = White-blotched River Stingray Potamotrygon leopoldi 2284px.jpg | image2 = Potamotrygon leopoldi.jpg | status = DD | status_system = IUCN3.1 | status_ref = [1] | regnum = Animalia | phylum = Chordata | classis = Chondrichthyes | ordo = Myliobatiformes | familia = Potamotrygonidae | genus = Potamotrygon | species = P. leopoldi | binomial = Potamotrygon leopoldi | binomial_authority = Castex & Castello, 1970 | synonyms = }} The Xingu River ray, white-blotched river stingray, or polka-dot stingray (Potamotrygon leopoldi) is a species of freshwater fish in the family Potamotrygonidae. It is endemic to the Xingu River basin in Brazil and prefers rocky bottoms.[1] It is sometimes kept in aquaria.[1] Appearance and relativesP. leopoldi reaches up to {{convert|40|cm|in|abbr=on}} in disc width,[2] {{convert|75|cm|in|abbr=on}} in total length and {{convert|20|kg|lb|abbr=on}} in weight.[3] Females grow larger than males.[4] It is closely related to the similar P. henlei from the Tocantins River basin and P. albimaculata from the Tapajós River basin.[5] Compared to P. henlei, P. leopoldi is deeper black above and its underparts are mostly brownish-dusky (large white center to underparts of P. henlei).[5][6] Compared to P. albimaculata, P. leopoldi has fewer and larger yellowish-white spots above.[5][6]References1. ^1 2 {{Cite journal | author = Charvet-Almeida, P., Rosa, R.S. & Pinto de Almeida, M. | title = Potamotrygon leopoldi | journal = The IUCN Red List of Threatened Species | volume = 2009 | page = e.T39403A10226180 | publisher = IUCN | date = 2009 | url = http://www.iucnredlist.org/details/39403/0 | doi = 10.2305/IUCN.UK.2009-2.RLTS.T39403A10226180.en | access-date = 15 January 2018}} {{Commons category|Potamotrygon leopoldi}}{{Taxonbar|from=Q2431915}}{{DEFAULTSORT:Xingu River Ray}}{{Rajiformes-stub}}2. ^{{FishBase|genus=Potamotrygon|species=leopoldi|year=2017|month=February}} 3. ^Fishing World-records: Potamotrygon leopoldi. Retrieved 22 February 2017. 4. ^{{cite web | url=http://www.dwazoo.com/animal/polka-dot-stingray/ | title=Polka-dot stingray, Potamotrygon leopoldi | publisher=Dallas World Aquarium | work=Animals | accessdate=25 January 2016}} 5. ^1 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. 6. ^1 {{cite| author=Ramos, H.A.C. | date=May 2017 | title=Commercial species of freshwater stingrays in Brazil | publisher=Department of Sustainable Use of Biodiversity and Forests, Brazilian Institute of Environment and Renewable Natural Resources and Ministry of the Environment | pages=1-33 }} 6 : Potamotrygon|Freshwater fish of Brazil|Endemic fauna of Brazil|Fish described in 1970|Articles containing video clips|Taxonomy articles created by Polbot |
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