| Main Ref. | Casciotta, J.R., M. de las Mercedes, A.E. Almirón and T. Litz, 2006 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | always different morphology between mature adults |
| Different colors | |
| Remarks | Males have longer pelvic-fin spines than females (18.3-21.7 vs. 16.4-18.0% SL). Males have distal tip of pelvic fins surpassing anal-fin origin and have flaps on first branched ray of pelvic fin. In males, abdominal region naked; genital papilla longer, slender and more acute; and absence of median plates on preanal region (Ref. 75967). |
| 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 distinguished by the following combination of characters: presence of heavy serrae along complete posterior pectoral spine margin; presence of narrow odontode free area along anterior margin of snout; anal fin with 5 branched rays; lateral line canal incomplete and discontinuous with an anterior field bearing 2-7 pores and posterior field with 8-19 pores (Ref. 75967). |
| 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 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 7 - 8 |
| Adipose fin | absent |
| Attributes | more or less truncate |
| Fins number | |
| Spines total | 1 - 1 |
| Soft-rays total | 5 - 5 |
| Pectoral | Attributes |
| Spines 1 | |
| Soft-rays 5 - 6 | |
| Pelvics | Attributes |
| Position before origin of D1 | |
| Spines 1 | |
| Soft-rays 5 - 5 |