| Main Ref. | Menezes, N.A. and C.A.S. de Lucena, 1998 |
| 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 |
Fewer lateral line scales (58-59, versus 64-70 in G. maracaiboensis and 68-75 in G. atratoensis), fewer scale rows between lateral line and anal-fin origin (9-11, versus 12-14 in G. maracaiboensis and 13-16 in G. atratoensis) and fewer scale rows around caudal peduncle (19, versus 21-23 in G. maracaiboensis and 21-23 in G. atratoensis). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | 58 - 59 |
| Pored lateral line scales | 58 - 59 |
| Scales in lateral series | |
| Scale rows above lateral line | 11 - 11 |
| Scale rows below lateral line | 11 - 11 |
| Scales around caudal peduncle | 19 - 19 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 16 - 16 |
| on upper limb | 9 - 9 |
| total | 25 - 25 |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 10 - 11 |
| Adipose fin | present |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 49 - 53 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 18 - 18 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 8 - 8 |