| Main Ref. | Provenzano-Rizzi, F. and R. Barriga-Salazar, 2020 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | |
| Cross section | flattened |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
This species is distinguished from R. macromystax by its snout shape which is more pointed and less projected, its snout length 11.3-13.3% SL (vs. 14.6-15.1% SL); with longer caudal peduncle, with postanal length 48.9-50.8% SL (vs. 45.2-46.1% SL); more distance of dorsal-fin to caudal-fin, its postdorsal length 57.5-59.0% SL (vs. 54.3% SL); abdomen plating variable, totally or partially covered with plates (vs. abdomen totally covered with plates) (Ref. 124527). |
| 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 | |
| Soft-rays total | |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |