Plesiotrygon iwamae

Rosa, Castello & Thorson, 1987

Long-tailed river stingray
Classification: Elasmobranchii Myliobatiformes Potamotrygonidae

Reference of the original description
Rosa, R.S. & Castello, H.P. & Thorson, T.B. (1987)
Plesiotrygon iwamae, a new genus and species of neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae). Copeia, 1987(2), 447–458

Image of the original description
Image in copyright.

Plesiotrygon iwamae
Holotype: MZUSP: 10153; Paratype: FMNH: 94500; MNRJ: 573; MZUSP: 14789; USNM: 258298; ZMH: 10343;

Images of types

Description :

Citation: Plesiotrygon iwamae Rosa, Castello & Thorson, 1987: In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 02/2024

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Plesiotrygon iwamae Rosa, Castello & Thorson, 1987, ERB 0997, female, 23, 2 cm DW, 114, 0 cm TL, Peru © Frederik H. Mollen (Elasmobranch Research Belgium)
Common names
spa Raya, eng Long-tailed river stingray, por Arraia, por Raia

South America: Upper to lower Amazon River basin, from Ecuador to Belém, Brazil, in the Napo, Solimões, Amazonas and Pará rivers. Source:

Feeds on small catfishes, insects, decapod crustaceans, and parasitic cestodes and nematodes.

Size / Weight / Age
58.0 cm WD (male/unsexed; [11350])

demersal; freshwater

shark-references Species-ID=7855;

Parasites (arranged by Jürgen Pollerspöck)
  • Ergasilus trygonophilus Domingues & Marques, 2010 [14716]