| Family: |
Acestrorhynchidae (Smallscale pike characins), subfamily: Roestinae |
| Max. size: |
21.6 cm SL (male/unsexed); max.weight: 209.6 g |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: upper Madeira River basin. |
| Diagnosis: |
Dorsal soft rays (total): 11-11; Anal spines: 4-5; Anal soft rays: 43-47; Vertebrae: 40-40. Readily distinguished from the other two species of the genus by having more branched rays on the anal fin (43-47, versus 41-43 in R. ogilviei and 38-41 in R. itupiranga). Hooks are present on the anal fin of adult male specimens of R. itupiranga and in one adult male of R. ogilviei but have not been found in males of R. molossus of comparable sizes. |
| Biology: |
|
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 03 April 2020 Ref. (130435)
|
| Threat to humans: |
harmless |
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