| General information |
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Bryconamericus aff. Iheringii (Boulenger, 1887) |
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| Common name | Tetra |
| Synonyms |
Lophiosilurus agassizi Steindachner, 1880 Tetragonopterus iheringii Boulenger, 1887 Bryconamericus iheringi (Boulenger, 1887) Tetragonopterus pliodus Cope, 1894 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
- |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
| Geographical distribution |
- |
| Occurrence |
- |
| Importance |
Food |
| Karyological information |
| Record 1 |
| Geographical area of study |
Agua da Floresta river, part of the Tibagi river basin, Parana, Brazil |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
13 (08 males; 04 females; 01 undetermined) |
| Diploid chromosome number |
52 |
| Karyotype formula |
8M+22SM+10ST+12A |
| Fundamental arm number |
92 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
Ag-NORs were present on the short arms of a single sm chromosome pair. Constitutive heterochromatin was detected on most chromosomes in the centromeric region, CMA3 positive signals and 18S rRNA genes were located on the short arms of sm chromosomes equivalent to the Ag-NORs, 5S rDNA genes wer located on the long arms of a sm chromosome pair. |
| Reference |
Marques MBDA, Moreira-Filho O, Garcia C, Margarido VP (2008). Cytogenetic analyses of two endemic fish species from the Sao Francisco River basin: Conorhynchus conirostris and Lophiosilurus alexandri (Siluriformes). Genetics and Molecular Biology, 31(1): 215-221. |
| Record 2 |
| Geographical area of study |
Iguaçu River, Lower Iguaçu River basin (State of Paraná), Brazil. |
| Source of chromosomes |
Kidney. |
| Number of specimens with sex |
4 (1 male, 3 female) |
| Diploid chromosome number |
52 |
| Karyotype formula |
10m+10sm+16st+16a |
| Fundamental arm number |
88 |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Single Ag-NOR present in terminal region of short arm of acrocentric chromosomes pair 22, and confirmed by 18S rDNA-FISH. C-banding showed heterochromatin in pericentromeric region of almost all chromosomes, in addition to revealing conspicuous blocks in terminal region of chromosome pairs corresponding to NORs. |
| Reference |
Prestes AB, Nardelli A, Paiz LM, Gavazzoni M, Margarido VP. (2019). Cytogenetic markers as tools in delimiting species of the highly diverse Neotropical fish Bryconamericus (Characiformes: Characidae). Neotropical Ichthyology, 17(3): e190057. |
| Record 3 |
| Geographical area of study |
Ijuí River, Upper Uruguay River basin (State of Rio Grande do Sul), Brazil. |
| Source of chromosomes |
Kidney. |
| Number of specimens with sex |
9 (4 male, 5 female) |
| Diploid chromosome number |
52 |
| Karyotype formula |
10m+16sm+14st+12a |
| Fundamental arm number |
92 |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
AgNOR present on chromosome pairs 21, 25 and 26. C-bands present in pericentromeric region of almost all chromosomes, as well as conspicuous blocks associated with NORs. |
| Reference |
Prestes AB, Nardelli A, Paiz LM, Gavazzoni M, Margarido VP. (2019). Cytogenetic markers as tools in delimiting species of the highly diverse Neotropical fish Bryconamericus (Characiformes: Characidae). Neotropical Ichthyology, 17(3): e190057. |
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