| General information |
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Orthospinus franciscencis (Eigenmann, 1914) |
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| Common name | |
| Valid name |
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| Synonyms |
- |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
- |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
| Geographical distribution |
- |
| Occurrence |
- |
| Remarks |
Probably, the valid name of the species is Orthospinus franciscensis (www.fishbase.org). |
| Karyological information |
| Geographical area of study |
Lake at the margins of the Sao Francisco River (Tres Marias, MG, Brazil) |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
27(10 males, 17 females) |
| Diploid chromosome number |
50 |
| Karyotype formula |
22m+20sm+2st+6a |
| Fundamental arm number |
94 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| 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. |
| Reference |
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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| Cross Link |