| General information |
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Tetragonopterus franciscoensis (Silva et al., 2016) |
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| Synonyms |
- |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
- |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
| Geographical distribution |
- |
| Occurrence |
- |
| Remarks |
Mapping of (TTAGGG)n revealed conspicuous signals on telomeres of all chromosomes and no internal telomere sequences. |
| Karyological information |
| 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. |
| Number of specimens with sex |
13 (8 male, 5 female) |
| Diploid chromosome number |
52 |
| Karyotype formula |
12m+12sm+28st/a |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
No heteromorphic sex chromosomes detected. |
| 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. |
| Reference |
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. |
| Cross Link |