What is Long-tailed river stingray?
{{Taxobox | name = Long-tailed river stingray | status = DD | status_system = IUCN3.1 | image = Plesiotrygon_iwamae_(Buffalo_Zoo).jpg | image2 = Plesiotrygon_iwamae_underside_(Buffalo_Zoo).jpg | regnum = [[Animal]]ia | phylum = [[Chordate|Chordata]] | classis = [[Chondrichthyes]] | subclassis = [[Elasmobranchii]] | ordo = [[Myliobatiformes]] | familia = [[Potamotrygonidae]] | genus = ''[[Plesiotrygon]]'' | species = '''''P. iwamae''''' | binomial = ''Plesiotrygon iwamae'' | binomial_authority = [[Ricardo de Souza Rosa|R. de S. Rosa]], [[Hugo Patricio Castello|Castello]] & [[Thomas B. Thorson|Thorson]], 1987 }} The '''long-tailed river stingray''' (''Plesiotrygon iwamae''), also known as the '''antenna ray''', is a [[species]] of [[river stingray|freshwater stingray]] in the [[family (biology)|family]] [[Potamotrygonidae]]. These animals have a long tail, small eyes, and few [[pectoral fin|pectoral-fin]] radials. They eat [[worm]]s, [[crustacean]]s, [[mollusk]]s, and small bottom fish (such as small [[catfish]]). They can detect electrical and chemical signals from prey in mud and sand. The species was mentioned in 1987 by Hugo P. Castello from Museu de Zoologia, [[University of São Paulo]]. Examples were then found in other museums that had been given wrong names or identified incorrectly. This fish does not appear often in the aquarium trade. ==References== * {{cite journal|title=''Plesiotrygon iwamae'', a New Genus and Species of Neotropical Freshwater Stingray (Chondrichthyes: Potamotrygonidae)|author=Ricardo S. Rosa; Hugo P. Castello; Thomas B. Thorson|journal=Copeia|year=1987|pages=447–458}} * {{FishBase species | genus = Plesiotrygon | species = iwamae | month = June| year = 2011}} ==Other websites== * [http://shark-references.com/species/view/Plesiotrygon-iwamae Species Description of Plesiotrygon iwamae at www.shark-references.com] [[Category:Rays]] [[Category:Freshwater fish]]