| General information |
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Oligosarcus paranensis (Menezes & Géry, 1983) |
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| Common name | Tambicu |
| Synonyms |
- |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
| Geographical distribution |
Brazil; Argentina |
| Occurrence |
native: Brazil; native: Argentina |
| Remarks |
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| Karyological information |
| Geographical area of study |
Tunas river, belonging to Piquiri river basin (Nova Laranjeiras, PR), Brasil |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
33 (12 males, 21 females) |
| Diploid chromosome number |
50 |
| Karyotype formula |
4m+10sm+16st+20a |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
Multiple AgNORs identified, involving one acrocentric chromosomal pair (17th) bearing terminal NORs on short arms, observed in all metaphases, plus 2-4 non-homologous NOR-bearing chromosomes. Showed a large amount of heterochromatin, with conspicuous blocks located terminally on the long arms of acrocentric chromosomes from the pairs 16, 17, 18, 19, 20, 21, and 22. |
| Reference |
Rubert M, Margarido VP (2007). Cytogenetic studies in three species of the genus Oligosarcus. Brazilian Archives of Biology and Technology, 50(1): 127-135.
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| Cross Link |