| General information |
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Characidium pterostictum (Gomes, 1947) |
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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; Crenuchidae. |
| Geographical distribution |
Brazil; Argentina |
| Occurrence |
native: Brazil; native: Argentina |
| Remarks |
Caintains mitotically unstable B chromosomes. |
| Karyological information |
| Record 1 |
| Geographical area of study |
Betari River, Brazil. |
| Source of chromosomes |
Renal tissue and gills. |
| Number of specimens with sex |
- |
| Diploid chromosome number |
50 |
| Karyotype formula |
32m+16sm+2a |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
Showed ZZ/ZW sex chromosome system. |
| Chromosome staining/banding/FISH |
W and B chromosomes contained completely darkly C-banded. Additional distal C-band observed. Autosomes showed pericentromeric C-bands. Distal C-bands observed on short arm of submetacentric pair no. 22 and long arm of acrocentric pair no. 25. |
| Reference |
Pansonato-Alves JC, Serrano E´A, Utsunomia R, Camacho JPM, Costa Silva GJd, et al. (2014). Single origin of sex chromosomes and multiple origins of B chromosomes in fish genus Characidium. PLoS ONE 9(9): e107169. doi:10.1371/journal.pone.0107169. |
| Record 2 |
| Geographical area of study |
Ecological Station, Carlos Botelho, Sao Miguel de Arcanjo, Brazil. |
| Source of chromosomes |
Cephalic portion of kidney. |
| Number of specimens with sex |
8 (2 male, 6 female) |
| Diploid chromosome number |
50 |
| Karyotype formula |
32m+16sm+2st |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
- |
| Reference |
Miyazawa CS, Galetti Jr. PM. (1994). First cytogenetical studies in Characidium species (Pisces: Characiformes, Characidiinae). Cytologia, 59: 73-79. |
| Cross Link |