| Main Ref. | Dagosta, F.C.P., 2025 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Anal-fin rays of males more posteriorly inclined, appearing shorter than of females and resulting in a relatively convex distal margin (vs. rays slightly more elongated than in males, resulting in distal margin straighter than in males); male body slightly deeper and smaller, with more marked coloration, particularly in unpaired fins and in oblique dark lateral stripe; male hooks on first to fifth branched anal-fin rays, one pair of hooks per lepidotrichia segment, maximum four segments with hooks, segment preceding the branching of the lepidotrichia is the most proximal with hooks (Ref. 138318). |
| Striking features | |
| Body shape lateral (shape guide) | short and / or deep |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | cycloid scales |
| Diagnosis |
Thisi species is distinguished from all its congeners by the following characters: autapomorphic presence of a well-defined, relatively broad oblique dark ventrolateral stripe on body, running approximately from end of pectoral fin rays to base of middle caudal-fin rays, and continuing straight onto the tip of the middle caudal-fin rays (vs. no well-defined longitudinal stripe, or dark lateral stripe never oblique); differs from I. nambiquara, I. parauapiranga by the absence of humeral blotch (vs. two in I. parauapiranga, one in I. nambiquara); differs from I. kerri by having 19-21 branched anal-fin rays (vs. 22-26) (Ref. 138318). |
| 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 | 14 - 14 |
| total | 34 - 34 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 9 - 9 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 19 - 21 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 9 - 11 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 5 - 6 |