| Main Ref. | Calegari, B.B., P. Lehmann A. and R.E. Reis, 2013 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Males with urogenital papilla immediately posterior to anal opening, a fleshy flap along the dorsal margin of the pelvic-fin spine, larger pelvic-fin spine (16.9-19.6% SL vs. 14.1-16.2% SL in females), wider nares diameter (13.1-15.0% vs. 9.2-11.5% HL in females); shorter prenasal length (17.6-20.1% vs. 22.0-24.4% in HL females) (Ref. 93039). |
| 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 |
Can be diagnosed from its congeners by having shorter pectoral-fin spine length (18.6-21.3 vs. 21.4-30.4% SL in remaining species). Additional characters useful for its identification include lower caudal peduncle (7.6-9.0 vs. 9.3-11.0 in Otothyropsis marapoama and 9.7-11.5% SL in Otothyropsis piribebuy), deeper caudal peduncle (7.6-9.0 vs. 6.2-7.6% SL in Otothyropsis polyodon); and dorsal-fin spinelet triangular in shape (vs. spinelet rectangular or quadrangular) (Ref. 93039). Description: pectoral-fin spine with odontodes. |
| 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 | 28 - 28 |
| Attributes | |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 2 - 2 |
| Soft-rays total | 6 - 7 |
| Adipose fin | absent |
| Attributes | forked |
| Fins number | |
| Spines total | 1 - 1 |
| Soft-rays total | 5 - 5 |
| Pectoral | Attributes other (see remarks) |
| Spines 1 | |
| Soft-rays 6 - 7 | |
| Pelvics | Attributes |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 6 - 6 |