Potamotrygon histrix

(Müller & Henle, 1841)

Porcupine river stingray
Classification: Elasmobranchii Myliobatiformes Potamotrygonidae

Reference of the original description
Müller, J. & Henle, F.G.J. (1841)
Systematische Beschreibung der Plagiostomen. Berlin, Veit, pp. 1–200

Synonyms / new combinations and misspellings
Ellipesurus hystrix, Pastinaca humboldtii, Potamotrygon aff. hystrix, Potamotrygon cf. histrix, Potamotrygon humboldtii, Potamotrygon hystrix, Taeniura hystrix, Trygon histrix, Trygon hystrix, Trygon (Trygon) hystrix

Potamotrygon histrix

Potamotrygon hystrix
Lectotype: MNHN: A-2449; Paralectotype: MNHN: A-2433 MNHN: A-8706 (lost) MNHN: ?A-2434 RMNH: 4258

Description :

Citation: Potamotrygon histrix (Müller & Henle, 1841): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2021

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Common names
Porcupine river stingray

Short Description
Occurs in marshy zones where it is frequently found partially hidden in the sandy bottom. This behavior, associated with its perfect immobility and its capacity to undergo homochromy, makes it practically undetectable to the eye. Like all species of this family, P. hystrix has a tail which is equipped with one or more spines which fall spontaneously and are replaced 2 or 3 times a year. At a length of 4 to 6 cm, the spine is a barbed, flattened skeletal formation inserted dorsally in the middle portion of the tail. Its structure is similar to that of a tooth and appears as an ivory cone covered with enamel. The spine is coated with an extremely toxic mucus produced by the cells of the skin and inflicts very painful wounds [20199].

South America: Paraná-Paraguay River basin. Source: www.gbif.org

Subtropical; 24°C - 26°C

Size / Weight / Age
Max length : 40.0 cm WD male/unsexed; [20199]; max. published weight: 15.0 kg [20204]

Freshwater; benthopelagic

shark-references Species-ID=4949;

Parasites (arranged by Jürgen Pollerspöck)
  • Potamotrygonocotyle eurypotamoxenus Domingues & Marques, 2007 [7408]
  • Potamotrygonocotyle tsalickisi Mayes, Brooks & Thorson, 1981 [14549] [22565]

  • Echinocephalus daileyi Deardorff, Brooks & Thorson, 1981 [16913] [22567]
  • Echinocephalus diazi Troncy, 1969 [16913]
  • Terranova caballeroi Diaz-Ungria, 1967 [17029]
  • Terranova diazungriai Moravec, Prouza & Royero, 1998 [22568] [22567]