| Family: |
Characidae (Characins; tetras), subfamily: Stethaprioninae |
| Max. size: |
18.8 cm SL (male/unsexed); 20.5 cm SL (female) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: Jacuí and Uruguay River basins in Rio Grande do Sul, Brazil. |
| Diagnosis: |
Dorsal soft rays (total): 11-11. Can be diagnosed from all its known congeners, except Oligosarcus jenynsii, Oligosarcus perdido, Oligosarcus acutirostris, Oligosarcus solitarius
and Oligosarcus hepsetus, by the number of perforated lateral line scales (55-65). Shares with the first two species the absence of a premaxillary foramen, present in the last three species and differs from Oligosarcus jenynsii by having a smaller orbital diameter and the tip of the pectoral fin failing to reach the pelvic-fin origin, and from Oligosarcus perdido by the presence of more horizontal scale rows around the caudal peduncle.
Description: Dorsal-fin rays ii,9; anal-fin rays iv-v,22-28; pectoral-fin rays i, 13-16; pelvic-fin rays i, 7 (Ref. 85166). |
| Biology: |
|
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435)
|
| Threat to humans: |
harmless |
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