| Main Ref. | Zanata, A.M. and P. Camelier, 2009 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Males with small hooks over anal-fin rays. |
| Striking features | |
| Body shape lateral (shape guide) | fusiform / normal |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | cycloid scales |
| Diagnosis |
Differs from all other congeners from northeastern Brazilian drainages by having two vertically elongated humeral blotches, a conspicuous and broad dark midlateral stripe (at least on anterior half of body), body highest along vertical slightly behind midlength of pectoral fin, 31-34 lateral-line scales, and two or three teeth on premaxillary outer series. Other characters important to distinguish this species include: anal fin with 21-22 total rays and 18-19 branched rays; dorsal-fin rays ii,9; 3-6 scales on base of anterior anal-fin rays; one or two maxillary teeth; fins homogeneously darkened by chromatophores; absence of red pigmentation on body when alive (Ref. 81202). Description: Dorsal-fin rays ii,9; anal-fin rays iii,18 or 19; pectoral-fin rays i,9, 10, 11 or 12; pelvic-fin rays i,7. Scale rows between lateral line and pelvic-fin insertion 4 or 5 (Ref. 81202). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 31 - 34 |
| Pored lateral line scales | 31 - 34 |
| Scales in lateral series | |
| Scale rows above lateral line | 5 - 5 |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 13 - 15 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | 18 - 18 |
| Vertebrae | |
| preanal | |
| total | 33 - 33 |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 11 - 11 |
| Adipose fin | present |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 21 - 22 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 10 - 13 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 8 - 8 |