| Family: |
Characidae (Characins; tetras), subfamily: Stethaprioninae |
| Max. size: |
5.1 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater; pH range: 7 |
| Distribution: |
South America: Lower tributaries of the río Uruguay (río Cuareim, río Salto, and río Negro basins), and río de La Plata (río Santa Lucía and arroyo Pand) in Uruguay. Not recorded from the Uruguay River basin in Brazil after extensive sampling for the last 20 years. |
| Diagnosis: |
Dorsal soft rays (total): 10-12; Vertebrae: 33-34. Can be diagnosed by the following apomorphies: foramen in posterior region of metapterygoid forms an incomplete arch, bordered posteriorly by the hyomandibula; pectoral-fin rays bearing hooks; posterior margin of second infraorbital posteroventrally oblique and second infraorbital ventrally bordering anterior region of third infraorbital; fourth infraorbital more developed longitudinally than dorsoventrally; ascending process of premaxilla reaching just anterior end of nasal; and lateral line interrupted. Further distinguished from several characids by having 6-11 maxillary teeth and longitudinal, wavy stripes laterally on body in larger specimens (Ref. 89798).
Description: Anal-fin rays iii-v,19-26; 4-6 scale rows between lateral line and pelvic-fin origin; 32-36 longitudinal scale series including pored scales (Ref. 89798). |
| Biology: |
Occurs in streams and semi-lentic and lotic shallow areas (up to 1.2 m deep) with moderate submerged vegetation and riparian vegetation composed by trees and shrubs. Streams are characterized by transparent water and bottom with mud, some stretches with sand or gravel (Ref. 89798). |
| IUCN Red List Status: |
Near Threatened (NT); Date assessed: 19 February 2021 (B2b(iii)) Ref. (130435)
|
| Threat to humans: |
harmless |
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