General information |
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| Eigenmannia virescens (Valenciennes, 1836) | ||
| Common name | Glass knifefish, Tuvira | |
| Synonyms |
Sternachus virescens Valenciennes, 1836 Sternatchus virescens Valenciennes, 1836 Sternopygus tumifrons Muller & Troschel, 1849 Sternopygus lineatus Muller & Troschel, 1849 Eigenmannia lineata (Muller & Troschel, 1849) |
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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; Sternopygoidei; Sternopygidae. |
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| Geographical distribution | Brazil; Argentina; Colombia; Peru; Venezuela; Ecuador; Uruguay; Guyana; Suriname; French Guiana |
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| Occurrence | Native: Brazil, Argentina, Colombia, Peru, Venezuela, Ecuador, Uruguay, Guyana, Suriname, French Guiana |
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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 | White-water rivers of the Eastern Amazon, America | |
| Source of chromosomes | Not reported |
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| Number of specimens with sex | 15 |
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| Diploid chromosome number | 38 |
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| Karyotype formula | 14m/sm+24a males;15m/sm+23a females |
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| Fundamental arm number | 52 for males & 53 for females |
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| Chromosome length | Not reported |
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| Sex chromosome | ZZ/ZW |
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| Chromosome staining/banding/FISH | C- banding revealed the presence of constitutive heterochromatin (CH) in the centromeric regions of all chromosomes; NOR was localized to the short arm of pair 15; DAPI fluorescence was found in the centromeric regions of all chromosome pairs; FISH with (TTAGGG)n telomeric probes did not show any evidence of an interstitial telomeric sequence (ITS). |
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| Reference(s) |
Fenocchio AS, Pastori MC, Roncati HA, Filho OM, Bertollo LAC (2003). A Cytogenetic Survey of the Fish Fauna from Argentina. Caryologia, 56(2): 197-204. |
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