| Potamotrygonidae (River stingrays), subfamily: Potamotrygoninae |
| 30.3 cm WD (male/unsexed) |
|
demersal; freshwater |
| South America: Brazil. |
|
This species is distinguished from its congeners by the following set of characters: dorsal disc brown or dark brown with two types of spots scattered through the disc, one type light, larger and distinct in beige or light brown, rounded, with diameter similar to spiracles length, the other type being dark, small and vermicular in shape, occurring between the light ones; large and rounded spiracles, mean spiracle length 5.3% DW (4.3-6.1% DW), with reduced and straight spiracular process covering a small part of the posterior part of the spiracular aperture; dermal denticles with central coronal plate acute and reduced, and lateral coronal ridges rounded and well developed; rostral projection well extended between the nasal capsules, with its extremity exceeding the anterior level of the nasal capsules; and anterior part of mesopterygium with its length between half and slightly less than half of the posterior part (Ref. 138774). |
|
|
Not Evaluated (N.E.) Ref. (130435)
|
| harmless |
Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.
