General information |
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| Tetragonopterus franciscoensis (Silva et al., 2016) | ||
| Synonyms |
- |
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| IUCN Red List status (2014) | Not Reported |
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| Habitat | - |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
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| Geographical distribution | - |
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| Occurrence | - | |
| Importance | ||
| Remarks | Mapping of (TTAGGG)n revealed conspicuous signals on telomeres of all chromosomes and no internal telomere sequences. |
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Karyological information |
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| Geographical area of study | Itapicuru-Mirim River (Itapicuru River Basin) in municipality of Tucano, state of Bahia, North eastern Brazil. | |
| Source of chromosomes | Anterior kidney. |
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| Number of specimens with sex | 13 (8 male, 5 female) |
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| Diploid chromosome number | 52 |
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| Karyotype formula | 12m+12sm+28st/a |
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| Fundamental arm number | - |
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| Chromosome length | - |
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| Sex chromosome | No heteromorphic sex chromosomes detected. |
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| Chromosome staining/banding/FISH | Ag-NOR detected on chromosome pair 8 with heteromorphic ribosomal cistrons at interstitial regions on short arms. C-banding revealed few heterochromatin blocks restricted to centromeres. CMA3 stained GC-rich sites were coincident with Ag-NORs. Additional CMA3 signals observed in, at least, three other chromosomal pairs. |
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| Reference(s) |
Fernandes MB, de Araújo J B, dos Santos JC, Galdino JH, de Mello Affonso PRA (2023). Cytogenetic analysis in Tetragonopterus franciscoensis (Characiformes): another piece to the karyoevolutionary puzzle of tetra fishes. Caryologia 76(1): 103-118. |
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