| Main Ref. | Kottelat, M. and J. Freyhof, 2007 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral (shape guide) | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Diagnosed from other congeners in Black and Caspian Sea basins by having the following characters: barbel reaching to or beyond posterior eye margin; pectoral extending to or 1 scale in front of pelvic origin in mature males; breast scaled between pectorals, scales extending forward beyond pectoral base (at least in some individuals of any population); head length 26-28% SL; head depth 16-17% SL at nape, 48-62% HL at eye; body depth 22-23% SL; head width 15-17% SL, 58-62% HL; eye diameter 4-6% SL, 3.1-3.7 times in head depth, 1.4-1.5 times in interorbital distance (at 5-6 cm SL); caudal peduncle depth 33-36% HL (Ref. 59043). |
| 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 | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | |
| Adipose fin | absent |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes more or less normal |
| Position abdominal behind origin of D1 | |
| Spines | |
| Soft-rays |