| Family: |
Characidae (Characins; tetras), subfamily: Stevardiinae |
| Max. size: |
10 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: Amazon River basin and the Urubamba, Comberciato, and Crisnejas rivers in Peru. |
| Diagnosis: |
Dorsal soft rays (total): 8-8; Anal soft rays: 19-23; Vertebrae: 41-43. This species is distinguished from its congeners, except H. jelskii, by the size of humeral spot over 7-8 horizontal series of scales (vs. 3-6). H. helleri differs from H. jelskii by the number of branched anal-fin rays (19-23 vs. 25-30), and number of scales along anal-fin base scale sheath (6-12 vs. 13-28). It is rather similar to H. inambari, but can be distinguished by the size of humeral spot (over 7-8 vs. 5-6 horizontal series of scales), number of predorsal scales (16-18 vs. 13-16), and by the total number of vertebrae (41-43 vs. 39-40) (Ref. 85819). |
| Biology: |
|
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 23 April 2014 Ref. (130435)
|
| Threat to humans: |
harmless |
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