General information |
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| Gymnotus inaequilabiatus (Valenciennes, 1839) | ||
| Synonyms |
Carapus inaequilabiatus Valenciennes, 1839 |
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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; Gymnotiformes; Gymnotoidei; Gymnotidae. |
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| Geographical distribution | Brazil; Argentina |
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| Occurrence | Native: Brazil, Argentina |
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| Importance | Food |
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| Remarks | Nil |
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Karyological information |
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| Geographical area of study | Riacho Agua do O, Santa Fe municipality, Parana, Brazil. | |
| Source of chromosomes | Cells extracted from kidney. |
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| Number of specimens with sex | 32 (2 male, 30 female) |
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| Diploid chromosome number | 54 |
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| Karyotype formula | 34m+18sm+2a |
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| Fundamental arm number | 106 |
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| Chromosome length | ||
| Sex chromosome | No heteromorphic sex chromosomes detected. |
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| Chromosome staining/banding/FISH | Ag-NOR sites situated in interstitial region of short arms of first metacentric chromosome pair, coinciding with secondary constriction. Constitutive heterochromatin blocks present in most chromosomes, with their distribution primarily concentrated in centromeric and pericentromeric regions, with an exception in chromosome pair 1, which displayed on short arm of both homologs. |
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| Reference(s) |
Gianini LPF, Balini LC, Porto FE, Borin-Carvalho LA, Fernandes CA. (2025). Chromosome spreading of the 5S rDNA clusters in the karyotype of Gymnotus inaequilabiatus (Gymnotiformes: Gymnotidae): insights into the role of the Rex-1 and Rex-3 retrotransposable elements of this process. Neotrop Ichthyol. 23(1): e240089. |
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