| Main Ref. | Miquelarena, A.M. and H.L. López, 2010 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Males possess minute and blunt bony hooks on dorsal, anal and caudal fins. Anal fin morphology is similar for both sexes, somewhat more concave in females (Ref. 83966). |
| Striking features | |
| Body shape lateral | short and / or deep |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | terminal |
| Type of scales | cycloid scales |
| Diagnosis |
Can be diagnosed from other members of the genus Hyphessobrycon by the possession of a well-defined, oblique and marginal black stripe on each lobe of the caudal fin. Differs further from its congeners by the combination of the following characters: maxilla with 1-3 teeth, bearing 3-10 cusps; outer premaxillary row with 2-3 small teeth, bearing 5 or 7 cusps; iv-v, 27-36 anal-fin rays; 33-36 scales on the longitudinal series; two vertically elongated dark humeral spots; black caudal spot rounded or fan-shaped; dorsal and anal fins with the first rays dappled in black; and presence of minute bony hooks on the dorsal, anal and caudal fins of the mature males (Ref. 83966). Description: Dorsal fin ii,8-iii,9; anal fin iv,27, v,27, vi,27, iv,28, v,28, iv,29, v,29, iv,30, v,30, iv,31, iv,35, or iv,36; pectoral fin i,10, i,11, or i,12; pelvic fin i,6 (Ref. 83966). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 6 - 8 |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 15 - 18 |
| on upper limb | 7 - 8 |
| total | |
| Vertebrae | |
| preanal | |
| total | 32 - 36 |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 10 - 12 |
| Adipose fin | present |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 31 - 40 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 11 - 13 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 7 - 7 |