| General information  | ||
| Rhamdia voulezi Shibatta and Garavello 1994 | ||
| Common name | South American catfish | |
| Valid name | Rhamdia quelen (Quoy & Gaimard, 1824) | |
| Synonyms | -   | |
| IUCN Red List status (2014) | Not Reported | |
| Habitat | Freshwater | |
| Systematics | 
        Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Heptapteridae.     | |
| Geographical distribution | Mexico; Brazil; Argentina; Colombia; Peru; Venezuela; Ecuador; Uruguay; Guyana; Suriname; French Guiana; Panama; Costa Rica; Nicaragua; Guatemala; Honduras; Belize; El Salvador; Trinidad and Tobago | |
| Occurrence | Native: Mexico, Brazil, Argentina, Colombia, Peru, Venezuela, Ecuador, Uruguay, Guyana, Suriname, French Guiana, Panama, Costa Rica, Nicaragua, Guatemala, Honduras, Belize, El Salvador, Trinidad and Tobago | |
| Importance | ||
| Remarks | Nil | |
| Karyological information  | ||
| Geographical area of study | Reservoir of the Segredo Hydroelectrical Plant in the region of Guarapuava, (River Iguacu basin) PR, Brazil. | |
| Source of chromosomes | Kidney cells | |
| Number of specimens with sex | 04 (03 males;01 female) | |
| Diploid chromosome number | 58 | |
| Karyotype formula | 36M+14SM+4ST+4A | |
| Fundamental arm number | 112 | |
| Chromosome length | Not reported  | |
| Sex chromosome | Not reported | |
| Chromosome staining/banding/FISH |  NOR obtained on one pair  | |
| Reference(s) | 
        Abucarma M, Martins-Santos IC (2001). Karyotype and B Chromosome of Rhamdia species (Pisces, Pimelodidae) endemic in the river Iguacu basin. Cytologia, 66 : 299-306.
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