Xingu River ray Xingu River ray 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. It is sometimes kept in aquaria. "P. leopoldi" reaches up to in disc width, in total length and in weight. Females grow larger than males. It is closely related to the similar "P. henlei" from the Tocantins River basin and "P. albimaculata" from the Tapajós River basin. Compared to "P. henlei", "P. leopoldi" is deeper black above and its underparts are
Xingu-Tocantins-Araguaia moist forests its valuable trees, and many native fauna and flora have become locally extinct. Large-scale mining near Marabá and elsewhere have directly affected the environment, and demand large quantities of wood to run the smelters. During the period from 2004 to 2011 the ecoregion experienced an annual rate of habitat loss of 0.94%. Global warming will force tropical species to migrate uphill to find areas with suitable temperature and rainfall. Low, flat, deforested ecoregions such as the Xingu-Tocantins-Araguaia moist forests are extremely vulnerable. Conservation units include the Tapirapé Biological Reserve and Tapirapé-Aquiri National Forest. Xingu-Tocantins-Araguaia moist forests The Xingu-Tocantins-Araguaia moist forests