| Main Ref. | Mattox, G.M.T., A. Acosta-Santos, J.D. Bogotá-Gregory, E. Agudelo and F.C.T. Lima, 2025 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Presence of hooks on anal- and pelvic-fin rays of mature males as small as 1.59 cm SL. |
| Striking features | |
| Body shape lateral (shape guide) | elongated |
| Cross section | compressed |
| 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 by the presence of a round flap of skin between contralateral pelvic-fins bases (vs. absence); differs further except P. nanus, P. pygmaeus, P. varii by the not having infraorbitals; differs from P. britzi, P. nanus, P. pygmaeus, P. varii by having fewer premaxillary teeth (14-19 vs. 20-29), from P. conwayi, P. marupiara, P. phasma by having more maxillary teeth (30-38 vs. 13-29); presence of two postcleithra; with five branched pelvic-fin rays; absence of adipose fin (Ref. 138024). |
| 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 | 9 - 11 |
| on upper limb | 2 - 4 |
| total | 12 - 13 |
| Vertebrae | |
| preanal | 14 - 14 |
| total | 32 - 33 |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral 9 - 9 | |
| Spines total | |
| Soft-rays total | |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 18 - 23 |
| Pectoral | Attributes |
| Spines 0 | |
| Soft-rays 0 - 0 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 5 - 5 |