{{Short description|Genus of cartilaginous fishes}} {{Automatic taxobox | image = Plesiotrygon iwamae (Buffalo Zoo).jpg | image_caption = ''Plesiotrygon iwamae'' | taxon = Plesiotrygon | authority = R. de S. Rosa, Castello & Thorson, 1987 | type_species = ''Plesiotrygon iwamae'' | type_species_authority = R. de S. Rosa, Castello & Thorson 1987 }}
'''''Plesiotrygon''''', the '''antenna rays''', is a small genus of freshwater stingrays in the family Potamotrygonidae endemic to the Amazon basin in South America.<ref name=FishBase>{{FishBase genus | genus = Plesiotrygon| month = August | year = 2013}}</ref><ref name=Carvalho2011>De Carvalho, M.R. and M.P. Ragno (2011). [http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492011000700001 An unusual, dwarf species of Neotropical freshwater stingray, Plesiotrygon nana sp. nov., from the upper and mid Amazon basin: the second species of Plesiotrygon (Chondrichthyes: Potamotrygonidae).] Papéis Avulsos de Zoologia 51(7): 101-138.</ref> They are found in large rivers and the lower part of their tributaries.<ref name=Carvalho2011/> The maximum disc width is up to {{convert|58|cm|in|abbr=on|0}}, but both species are very long-tailed (tail length typically at least twice the disc width).<ref name=FishBase/><ref name=Carvalho2011/>
''Plesiotrygon'' are occasionally kept in aquariums and both species have been bred in captivity, but they are sensitive and the tail is easily damaged.<ref name=Reynolds2017>{{cite book |author=Jennifer Reynolds |author2=Erica Hornbrook |author3=George Stettner |author4=Richard Terrell |chapter=Husbandry of freshwater stingrays |editor=Mark Smith |editor2=Doug Warmolts |editor3=Dennis Thoney |editor4=Robert Hueter |editor5=Michael Murray |editor6=Juan Ezcurra | year=2017 |title=Elasmobranch Husbandry Manual II | publisher=Ohio Biological Survey | pages=99–112 | isbn=978-0-86727-166-9 }}</ref><ref>{{cite web| title=Plesiotrygon iwamae | url=http://amazonasrochen.ch/page/rochen/arten/antennen.htm | publisher=Amazonas Rochen | language=DE | access-date=30 October 2017}}</ref>
==Species== There are two recognized species:<ref name=FishBase/>
* ''Plesiotrygon iwamae'' <small>R. de S. Rosa, Castello & Thorson, 1987</small> (long-tailed river stingray, antenna ray) * ''Plesiotrygon nana'' <small>M. R. de Carvalho & Ragno, 2011</small> (black-tailed antenna ray, dwarf antenna ray)
== References == {{Reflist}}
{{Taxonbar|from=Q4546289}}
Category:Potamotrygonidae Category:Batomorphi genera Category:Freshwater fish genera
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