| Main Ref. | Murdy, E.O. and K. Shibukawa, 2001 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | fusiform / normal |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Pectoral -fin rays free and silk-like. Dorsal and anal fins with chocolate-brown distal margins. Top of skull bony, adductor mandibulae complex not originating from frontal bone as in congeners. Epineurals present from 1st precaudal vertebrae to 10th caudal vertebrae. Pelvic fin long when compared with O. rebecca. Cycloid scales embedded on head and body. Eyes rudimentary but distinct, covered by skin. Several short barbels may be present on underside of chin (Ref. 45323). |
| 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 | 10 - 10 |
| total | 32 - 32 |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 6 - 6 |
| Soft-rays total | 37 - 43 |
| Adipose fin |
| Attributes | more or less normal |
| Fins number | 1 |
| Spines total | 1 - 1 |
| Soft-rays total | 35 - 41 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 20 - 28 | |
| Pelvics | Attributes joint, cup-like |
| Position thoracic before origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 5 |