| Main Ref. | Szelistowski, W.A., 1990 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| 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 |
4 (4-5) pairs of trifid incisors in upper jaw, 4 pairs in lower jaw; anus markedly closer to anal fin origin than to rear of disc; dorsal-caudal distance forward passing tip of, usually extending to about middle of, pectoral fin; margin of anterior nostril without dermal flap (Ref. 42103). Nearly transparent, light olive; body markings quite variable in intensity, ranging from dark and distinct to light and indistinct, sometimes giving an overall mottled appearance (Ref. 42103). |
| 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 | 29 - 31 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 10 - 12 |
| Adipose fin | absent |
| Attributes | other (see remark); more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 8 - 10 |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 21 - 24 | |
| Pelvics | Attributes part of sucker-disc |
| Position | |
| Spines | |
| Soft-rays |