General information |
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| Heptapterus mustelinus (Valenciennes, 1835) | ||
| Common name | Bagre | |
| 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; Siluriformes; Heptapteridae. |
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| Geographical distribution | Brazil; Argentina; Uruguay; Suriname |
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| Occurrence | Native: Brazil, Argentina, Uruguay, Suriname |
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| Importance | ||
| Remarks | - |
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Karyological information |
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| Geographical area of study | Pindorama stream, tributary of Sao Francisco Verdadeiro River, upper Parana River basin, Parana, Brazil. | |
| Source of chromosomes | Anterior portion of kidney. |
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| Number of specimens with sex | 8 (4 male, 4 female) |
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| Diploid chromosome number | 54 |
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| Karyotype formula | 26m+18 sm+4st+6a |
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| Fundamental arm number | 102 |
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| Chromosome length | - |
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| Sex chromosome | - |
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| Chromosome staining/banding/FISH | Multiple NORs observed on p arm (terminal position) of acrocentric pair 25, sporadically on q arm of metacentric pair 1, p arm of metacentric pair 2, q arm of submetacentric pair 18. C-bands present in centromeric region of most chromosome complement and associated with NORs. Double staining with CMA3 and DAPI demonstrated GC-rich centromeric heterochromatin of pairs 1, 3, 4, 6, 10, 14, 17, 23 and 27, besides the one that coincides with the Ag-NORs. C-band and NORs regions were negative DAPI. |
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| Reference(s) |
Yano CF, Margarido VP (2012). First cytogenetic studies of the genus Heptapterus (Actinopterygii, Siluriformes): karyotype differentiation and review of cytogenetic data on the Heptapteridae family. Journal of Fish Biology, 81: 939–953. |
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