| Main Ref. | Bertaco, V.A. and L.R. Malabarba, 2010 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Males are easily recognized by the presence of bony hooks on the dorsal-, anal-, pelvic-, and pectoral-fin rays; slightly differ in pectoral- and pelvic-fin lengths and body depth compared to 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 | compressed |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | cycloid scales |
| Diagnosis |
This species is distinguished from its congeners, except H. divisorensis, by the presence of a wide black asymmetrical spot covering base of caudal-fin rays and extending along entire length of caudal-fin rays 9 to 12-13. It differs from H. divisorensis by the absence of 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, and by the smaller number of scales along anal-fin base scale sheath (15-16 vs. 17-22) (Ref. 85819). |
| Ease of Identification |
| Lateral Lines | 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 - 14 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 11 - 12 |
| 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 |
| Fins number | |
| Spines total | |
| Soft-rays total | 26 - 27 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 10 - 12 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 7 - 8 |