Potamotrygon marquesi

Da Silva & Loboda, 2019

Classification: Elasmobranchii Myliobatiformes Potamotrygonidae

Reference of the original description
da Silva, J.P.C.B. & Loboda, T.S. (2019)
Potamotrygon marquesi, a new species of neotropical freshwater stingray (Potamotrygonidae) from the Brazilian Amazon Basin. Journal of Fish Biology, 95(2), 594–612

Potamotrygon marquesi
Holotype: MZUSP: 117790; Paratype: MZUSP: 117795; MZUSP: 117798; MZUSP: 117787;

Images of types

Description :

Citation: Potamotrygon marquesi Da Silva & Loboda, 2019: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 03/2024

Please send your images of "Potamotrygon marquesi" to info@shark-references.com

Potamotrygon marquesi Da Silva & Loboda, 2019, ERB 0850, female, 19, 9 cm DW, 36, 5 cm TL, Brazil © Frederik H. Mollen (Elasmobranch Research Belgium)
Common names
eng Marques's freshwater stingray

Short Description
Original diagnose after DA SILVA & LOBODA, 2019 [27284]: Potamotrygon marquesi is a new species from northern South America distinguished from congeners by the following combination of characters: dorsal disc background usually beige with grey tonalities, but also light to dark brown mixed with shades of grey and having open and closed bicolor rings; these rings in grey or beige internally and externally surrounded by a dark grey band; disc bearing large and nearly star-shaped denticles with wide and flat central coronal plates (ccp) connected to five or six lateral coronal ridges (lcr) by shallow crown ridges (crr); tail dorsum with a single row of pointed spines, from its base to caudal barb insertion; lateral row of small spines starting at level of posterior half of tail and extending to caudal barb insertion.

Tarauacá River (Juruá River sub-basin), Arara Lake, Tarauacá County, Acre State; Arari River, Cachoeira do Arari County, Marajó Island, Pará State [27284]

Size / Weight / Age
230–500mm TL; 120–302mm DW [27284]

freshwater [27284]

Teeth set in quincunx; tooth rows varying 28–39 on upper jaw and 26–38 on lower jaw. Teeth in symphysis 2–4 on upper jaw and 2–3 on lower jaw. Upper and lower jaws with monognathic heterodonty. Sexual dimorphism present: central tooth rows cuspidate in males, with cusps of lower jaw more developed than cusps of upper jaw; females without cusps. Heterodonty restricted to adult specimens and similar in both sexes: upper jaw intermediate tooth rows slightly larger than teeth in central and lateral rows and lower jaw central tooth rows larger than lateral rows. Subadult and juvenile specimens devoid of heterodonty [27284]

shark-references Species-ID=15440; CITES: (see: Protected Species for more details) Convention on International Trade in Endangered Speciesof Wild Fauna and Flora annex: III; Council Regulation 2017/160 annex: C