General information |
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| Astyanax hastatus (Myers, 1928) | ||
| Valid name | Deuterodon hastatus (Myers, 1928) | |
| Synonyms |
- |
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| IUCN Red List status (2014) | Not Reported |
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| Habitat | Freshwater |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
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| Geographical distribution | Brazil |
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| Occurrence | Native: Brazil |
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| Importance | ||
| Remarks | ||
Karyological information |
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| 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) |
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| Diploid chromosome number | 50 |
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| Karyotype formula | 4M+8SM+10ST+28A (cytotype A); 8M+10SM+14ST+18A (cytotype B); 6M+8SM+4ST+32A (cytotype C) |
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| Fundamental arm number | Not reported |
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| Chromosome length | Not reported |
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| Sex chromosome | Not reported |
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| 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. |
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| Reference(s) |
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. |
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