General information |
||
| Pyrrhulina brevis (Steindachner, 1876) | ||
| 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, Peru Questionable: Argentina |
|
| Importance | ||
| 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(s) |
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. |
|