Potamotrygon adamastor, the Branco River freshwater stingray, is a type of freshwater tropical ray found exclusively in the state of Roraima, Brazil.[1][2]
Description
This species can be distinguished from its congeners through several characteristics, such as dark gray dorsal disc; body covered with small yellow-white ocelli with a slender dark contour; small irregular spots on disc margin (sometimes); and robust and wide tail base.[2]The size of this tropical stingray ranges from 45 cm to 62 cm disc width (DW).[1][2]
Habitat & distribution
It is endemic to a single locality of Uriracuera river, an upper branch of Rio Branco river system, Roraima, Brazil.[1][2] This demersal species tends to inhabit the turbid wetlands with sandy sediments.[1] The only threat to this species might be water contamination resulted from nearby illegal mining activities, as there are no records about its capture by fisheries.[1]
References
- ^ a b c d e f "Potamotrygon adamastor: Fontenelle, J.P. & Sayer, C." IUCN Red List of Threatened Species. 2021-02-23. doi:10.2305/iucn.uk.2022-2.rlts.t188060303a188067164.en. Retrieved 2025-02-22.
- ^ a b c d Fontenelle, JoãO Pedro; De Carvalho, Marcelo R. (2017-08-21). "Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography". Zootaxa. 4310 (1). doi:10.11646/zootaxa.4310.1.1. ISSN 1175-5334.