| Main Ref. | Martins, F.O., M.M. Marinho, F. Langeani and J.P. Serra, 2012 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | |
| Diagnosi |
Diagnosed from all species of Hypostomus, except H. levis, by lacking adipose fin. Differs from H. levis mainly by having bifid teeth, with mesial cusp large and rounded, and lateral cusp small and pointed; 23-42 premaxillary and 25-42 dentary teeth; black spots on body. Can be separated from all species of Hypostomus in the La Plata basin (except H. ancistroides, H. angipinnatus, H. aspilogaster, H. borellii, H. boulengeri, H. brevis, H. commersoni, H. cordovae, H. denticulatus, H. dlouhyi, H. fluviatilis, H. heraldoi, H. hermanni, H. isbrueckeri, H. laplatae, H. latifrons, H. mutucae, H. nigromaculatus, H. peckoltoides, H. piratatu, H. topavae, H. uruguayensis, and H. variostictus) by the presence of darker spot on body. |
| 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 | |
| totale | |
| Vertebre | |
| preanal | |
| totale |
| 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 |