General information |
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| Orthospinus franciscencis (Eigenmann, 1914) | ||
| Common name | ||
| Valid name | ||
| Synonyms |
- |
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| IUCN Red List status (2014) | Not Reported |
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| Habitat | - |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
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| Geographical distribution | - |
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| Occurrence | - | |
| Importance | ||
| Remarks | Probably, the valid name of the species is Orthospinus franciscensis (www.fishbase.org). |
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Karyological information |
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| Geographical area of study | Lake at the margins of the Sao Francisco River (Tres Marias, MG, Brazil) | |
| Source of chromosomes | Kidney |
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| Number of specimens with sex | 27(10 males, 17 females) |
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| Diploid chromosome number | 50 |
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| Karyotype formula | 22m+20sm+2st+6a |
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| Fundamental arm number | 94 |
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| Chromosome length | Not reported |
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| Sex chromosome | Not reported |
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| Chromosome staining/banding/FISH | Constitutive heterochromatin detected in few chromosomes in centromeric and in distal regions of short arms of submetacentric pair no. 19 and the subtelocentric pair no. 22. Ag-NORs were also located in a distal position on short arm of the subtelocentric pair no. 22, coinciding with a heterochromatic region. |
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| Reference(s) |
Moreira PWA, Bertollo LAC, Moreira-Filho O (2007). Comparative cytogenetics between three Characidae fish species from the Sao Francisco river basin. Caryologia, 60(1-2): 64-68.
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