| Main Ref. | Garavello, J.C.I. and F.A.A. Sampaio, 2010 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Anal-fin and pelvic-fin hooks present only in small specimens and only in males to 60.5 mm SL. Females larger than males; snout length and body depth proportionally larger in females. Males with larger orbital diameter, length of anal, pectoral and pelvic fins. |
| Striking features | |
| Body shape lateral (shape guide) | short and / or deep |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
This species is distinguished from all its congeners from Rio Iguaçu by the following set of characters: third infraorbital deep and not in contact with preopercle, leaving an narrow naked area between its border and preopercle; premaxillary external series with 4-6, usually 5 or 6 pentacuspid or heptacuspid teeth; first branchial arch 9-12, usually 10 rakers in upper branch and 13-16, usually 14 or 15 rakers in lower branch; a narrow and elongated vertical humeral bar (Ref. 85756). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 36 - 39 |
| Scales in lateral series | |
| Scale rows above lateral line | 6 - 7 |
| Scale rows below lateral line | 5 - 6 |
| Scales around caudal peduncle | 15 - 17 |
| 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 | |
| Soft-rays total | 8 - 10 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 16 - 23 |
| Pectoral | Attributes |
| Spines 1 | |
| Soft-rays 10 - 14 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 7 - 8 |