| Main Ref. | Carvalho, T.P. and R.R. Reis, 2009 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Characterized by the presence of an urogenital papilla, positioned just behind the anal opening in males. Adult males also possess a fleshy flap along the dorsal margin of the first thickened pelvic-fin ray. The flap is absent in juvenile males and females. Males have a longer pelvic-fin that surpasses anal-fin origin, falling short of anal-fin origin in females (Ref. 80996) |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | sucker-like |
| Position of mouth | sub-terminal/inferior |
| Type of scales | |
| Diagnosis |
Hisonotus leucophrys differs from its congeners, except Hisonotus montanus, by having comparatively broader light stripes on dorsolateral surface of head, from snout tip to posterior end of compound pterotic (wider than pupil diameter) vs. narrow light stripes on dorsal surface of head extended from snout tip to posterior end of compound pterotic, or no longitudinal stripes in that region. Hisonotus leucophrys differs from Hisonotus montanus by having the snout covered with odontodes, without an odontode-free band vs. anterior portion of snout with an odontode-free band; and by having an infraorbital canal entering the infraorbital series via the sphenotic vs. infraorbital canal entering the infraorbital series via the compound pterotic (Ref. 80996). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| 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 | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 2 |
| Soft-rays total | 7 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | 1 |
| Soft-rays total | 5 |
| Pectoral | Attributes |
| Spines 1 | |
| Soft-rays 6 | |
| Pelvics | Attributes |
| Position | |
| Spines 1 | |
| Soft-rays 5 |