| General information |
|
Pyrrhulina brevis (Steindachner, 1876) |
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| Synonyms |
- |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characoidei; Lebiasinidae. |
| Geographical distribution |
Brazil; Argentina; Peru |
| Occurrence |
native: Brazil; questionable: Argentina; native: Peru |
| Remarks |
- |
| Karyological information |
| Geographical area of study |
Adolfo Ducke Rerserve- Igarapé from Barro Branco, Brazil. |
| Source of chromosomes |
Kidney cells. |
| Number of specimens with sex |
30 (13 male, 17 female) |
| Diploid chromosome number |
42 |
| Karyotype formula |
2sm+4st+36a |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Constitutive heterochromatin distribution restricted to centromeric and telomeric regions of several chromosomes with some conspicuous interstitial C-bands. 18S rDNA sites observed on p-arms of three chromosome pairs (st pair no. 3 and acrocentric pairs nos. 11 and 14). Pair 3 showed remarkable 18S size heteromorphism between homologs. 5S rDNA sites observed on p-arms of chromosome pair nos. 3, 7, 8 10 and 14, where pair nos. 7 and 10 encompassed double 5S rDNA sites. |
| Reference |
de Moraes RLR, Sember A, Bertollo LAC, de Oliveira EA, Ráb P, Hatanaka T, Marinho MMF, Liehr T, Al-Rikabi ABH, Feldberg E, Viana PF, Cioffi MdB (2019). Comparative cytogenetics and Neo-Y formation in small-sized fish species of the Genus Pyrrhulina (Characiformes, Lebiasinidae). Front. Genet. 10:678. doi: 10.3389/fgene.2019.00678. |
| Cross Link |