General information |
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| Gymnotus sylvius Albert & Fernandes-Matioli, 19 | ||
| Synonyms |
- |
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| IUCN Red List status (2014) | Not Reported |
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| Habitat | Freshwater |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Gymnotiformes; Gymnotoidei; Gymnotidae. |
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| Geographical distribution | Brazil |
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| Occurrence | Native: Brazil |
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| Importance | Food |
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| Remarks | Nil |
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Karyological information |
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| Geographical area of study | Agua da Madalena - Botucatu-Sao Paulo River; Araqua – Botucatu-Sao Paulo River; Campo Novo- Bauru-Sao Paulo River; Mogi-Guacu - Pirassununga-Sao Paulo River, Brazil | |
| Source of chromosomes | Not reported |
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| Number of specimens with sex | 39 |
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| Diploid chromosome number | 40 |
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| Karyotype formula | 22m+12sm+6st |
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| Fundamental arm number | Not reported |
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| Chromosome length | ||
| Sex chromosome | Not reported |
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| Chromosome staining/banding/FISH | The C-banding technique revealed centromeric marks in all chromosomes. NORs were localised on pair 2 as revealed by silver staining and hybridization with 18S rDNA probes. The 5S rDNA probes revealed signals on one pair. |
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| Reference(s) |
Scacchetti PC, Pansonato-Alves JC, Utsunomia R, Oliveira C, Foresti F (2011). Karyotypic diversity in four species of the genus Gymnotus Linnaeus, 1758 (Teleostei, Gymnotiformes, Gymnotidae): physical mapping of ribosomal genes and telomeric sequences. Comparative Cytogenetics, 5(3): 223–235. |
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