| Main Ref. | Bertaco, V.A. and L.R. Malabarba, 2010 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Males with bony hooks in dorsal-, anal-, pelvic- and pectoral-fin rays; slightly differ in pectoral- and pelvic-fin lengths and body depth when compared with females; anal-fin slightly concave (vs. nearly straight in females); mature males with gill gland on first gill arch, covering the first branchial filaments (Ref. 85819). |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
This species is distinguished from its congeners, except H. helleri, by the size of humeral spot (over 7-9 vs. 3-6 horizontal series of scales); differs from H. helleri by the number of branched anal-fin rays (25-30 vs. 19-23), and by the number of scales along anal-fin base scale sheath (13-28 vs. 6-12); differs from H. divisorensis, by the absence of a wide black asymmetrical spot covering base of caudal-fin rays and black band in the lower half of the caudal peduncle (vs. presence), and by the number of scale rows above and below lateral line (7-9 and 5-7 vs. 6-7 and 4-5, respectively) (Ref. 85819). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 40 - 43 |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | 5 - 7 |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 16 - 16 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 12 - 14 |
| on upper limb | 7 - 9 |
| total | |
| Vertebrae | |
| preanal | 16 - 18 |
| total | 38 - 40 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 8 - 8 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 25 - 30 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 10 - 13 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 6 - 7 |