| Main Ref. | da Graça, W.F., C.S. Pavanelli and P.A. Buckup, 2008 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | different morphology during breeding season only |
| Different colors | different colors during breeding season only |
| Remarks | Breeding males have anal, pelvic and pectoral fins conspicuously dark, mainly on distal part of fin, and caudal fin hyaline while females have dorsal, pectoral, pelvic and anal fins notably lighter than males. Breeding males differ from breeding females by the presence of blunt sexual hook on distal portion of some branched rays of pelvic and pectoral fins, mainly in former (vs. absence of sexual hooks on fins in females). |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | sub-terminal/inferior |
| Type of scales | cycloid scales |
| Diagnosis |
Belongs to a group of species, including Characidium xavante, distinguished uniquely by having high number (12-18) of dark, vertical bars on the body, each bar having the width of a scale. Differs from Characidium xavante by a greater number of scales around the caudal peduncle (12 vs. 10), narrower interorbital region (interorbital distance 20.5-28.6 vs. 30.1-38.0% HL) and deeper caudal peduncle (caudal peduncle depth 46.2-57.8% vs. 35.4-44.9% HL). Additional conspicuous external characters which are not unique but are useful in the identification of this species include absence of adipose fin, incomplete lateral line, and presence a dark blotch on the caudal peduncle (Ref. 75787). Description: Dorsal fin iii9; iii,10; Anal fin iii,6; Pectoral fin iii,8, iii9, iii,10; Pelvic i7, i8 (Ref. 75787). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 29 - 33 |
| Pored lateral line scales | 5 - 8 |
| Scales in lateral series | |
| Scale rows above lateral line | 3 - 5 |
| Scale rows below lateral line | 4 - 5 |
| Scales around caudal peduncle | 12 - 12 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total | 33 - 33 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 12 - 13 |
| Adipose fin | absent |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 9 - 9 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 11 - 13 | |
| Pelvics | Attributes |
| Position abdominal | |
| Spines | |
| Soft-rays 8 - 9 |