| General information |
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Astyanax hastatus (Myers, 1928) |
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| Valid name |
Deuterodon hastatus (Myers, 1928) |
| 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 |
| Occurrence |
native: Brazil |
| Remarks |
|
| Karyological information |
| Geographical area of study |
Guapimirim River basin, Serra dos Orgãos, Rio de Janeiro, Brazil |
| Source of chromosomes |
|
| Number of specimens with sex |
74 (20 females; 18 males; 36 unidentified) |
| Diploid chromosome number |
50 |
| Karyotype formula |
4M+8SM+10ST+28A (cytotype A); 8M+10SM+14ST+18A (cytotype B); 6M+8SM+4ST+32A (cytotype C) |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
The heterochromatin was located throughout pericentromeric regions of several chromosomal pairs. Cytotype A presented three Ag-NOR bearing sites, while six signals were identified by 18S-FISH on acrocentric chromosomes terminally. Cytotype B presented three Ag-NOR bearing sites, while four signals were observed by 18S-FISH on acrocentric chromosomes. Cytotype C presented two Ag-NORs sites, while four ribosomal DNA regions were identified on acrocentric chromosomes by 18S-FISH. |
| Reference |
Kavalco KF, Brandão KDO, Pazza R, Almeida-Toledo LFD ( 2009) Astyanax hastatus Myers, 1928 (Teleostei, Characidae): A new species complex within the genus Astyanax? Genetics and Molecular Biology, 3 2 (3): 477-483. |
| Cross Link |