| Main Ref. | Roxo, F.F., C. Oliveira and C.H. Zawadzki, 2012 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | always different morphology between mature adults |
| Different colors | |
| Remarks | The male has a papilla in the cloaca, and a membrane in the ventral fin, both of which are absent in the female. Males reach a greater length, as observed in paratypes. |
| 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 |
Distinguished from all species of the genus Neoplecostomus, except N. paranensis, due to the lack of, or reduction in size of, the adipose fin (vs. adipose fin moderate to well developed and always present). It can be separated from N. paranensis by the presence of conspicuous dark spots all over the body and the absence of some fins and dorsal bands (vs. lacking conspicuous dark spots and having five dark bands on dorsum evident). It further differs from N. paranensis by a greater head depth 55.6-63.9% in head length and greater mandibular width 12.5-17.8% in head length (vs. 44.4-55.4% and 8.4-12.4%, respectively) (Ref. 89726). Description: adipose fin ill-developed and not always present; dorsal-fin with one flexible spine, followed by seven branched rays; anal fin with one flexible unbranched ray and five branched rays; pectoral fin with one spine and six branched rays; pelvic fin with one unbranched ray and five branched rays (Ref. 89726). |
| 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 | first fin ray very elongated |
| Fins number | 1 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 1 - 1 |
| Soft-rays total | 7 - 7 |
| Adipose fin |
| Attributes | forked |
| Fins number | |
| Spines total | 0 - 0 |
| Soft-rays total | 6 - 6 |
| Pectoral | Attributes |
| Spines 1 | |
| Soft-rays 6 - 6 | |
| Pelvics | Attributes |
| Position before origin of D1 | |
| Spines 0 | |
| Soft-rays 6 - 6 |