| Main Ref. | Freyhof, J., M. Kottelat and A. Nolte, 2005 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Differs from all other species of Cottus in France by having only 10-11 1/2 anal-fin rays. Other characters useful in the identification: posterior tip of second dorsal fin reaching rudimentary caudal-fin rays; no transverse bands on pelvic fin; lateral line complete, with 30-33+1 pores; 13 pectoral-fin rays; no prickling on body; length of caudal peduncle 58-71% HL; depth of caudal peduncle 26-32% HL; predorsal length 34-37 % SL; distance from tip of snout to origin of second dorsal fin 54-57% SL; preanal length 54-58% SL; first and second dorsal fins slightly to moderately joined; snout pale; first dorsal fin with very dark base (Ref. 55856). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 30 - 33 |
| 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 | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | |
| Soft-rays total | 10 - 11 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 13 - 13 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 3 - 4 |