General information |
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| Astyanax ribeirae Eigenmann, 1911 | ||
| Valid name | Deuterodon ribeirae (Eigenmann, 1911) | |
| 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; Characiformes; Characidae. |
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| Geographical distribution | Brazil |
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| Occurrence | Native: Brazil |
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| Importance | ||
| Remarks | ||
Karyological information |
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| Geographical area of study | Ribeira de Iguape river basin, São Paulo State, Brazil | |
| Source of chromosomes | ||
| Number of specimens with sex | 24 |
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| Diploid chromosome number | 50 |
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| Karyotype formula | 4m +10sm+ 6st+30a |
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| Fundamental arm number | 70 |
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| Chromosome length | ||
| Sex chromosome | ||
| Chromosome staining/banding/FISH | The silver nitrate staining revealed single NORs on ST/A chromosomes. C-banding revealed little amounts of constitutive heterochromatin, located at pericentromeric region of some chromosomes. Four minute sites of 18S rDNA were located by FISH at short arms of middle-sized acrocentric pairs. Six 5SrDNA sites were observed at the terminal region on short arms of a middle sized acrocentric pair and on two small acrocentric pairs. |
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| Reference(s) |
Kavalco KF, Pazza R, de Almeida-Toledo LF (2010). Molecular cytogenetics of Astyanax ribeirae (Teleostei, Characidae), an endemic characin of the Atlantic rainforest. Nucleus, 53(1):51-54. |
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