| Main Ref. | Bertaco, V.A., L.R. Malabarba, M. Hidalgo and H. Ortega, 2007 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral (shape guide) | elongated |
| Cross section | compressed |
| Dorsal head profile | more or less straight |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | cycloid scales |
| Diagnosis |
This species is distinguished from its congeners by the following characters: a wide black asymmetrical spot covering base of caudal-fin rays, extending along entire length of caudal-fin rays 9 to 12-13 (except H. surinamensis); a black band in the lower half of the caudal peduncle from the region above the last anal-fin rays to the caudal-fin base; 4-5 scale rows below lateral line (vs. 5-9) except from H. mikrostiktos and H. surinamensis (Ref. 75799); differs from H. mikrostiktos by the number of branched anal-fin rays (24-30 vs. 18-21), and from H. surinamensis by the number of scale sheath along anal-fin base (17-22 vs. 12-17), and by the number of cusps in the inner row of the premaxilla teeth (5-7 vs. 4-5) (Ref. 85819). |
| Ease of Identification |
| Lateral Lines | 1 Interrupted: No |
| Scales on lateral line | 39 - 41 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 6 - 7 |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 14 - 16 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 12 - 14 |
| on upper limb | 7 - 9 |
| total | |
| Vertebrae | |
| preanal | 16 - 17 |
| total | 38 - 39 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 8 - 8 |
| Adipose fin |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total | 25 - 28 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 10 - 13 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |