| General information |
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Gymnotus jonasi Albert & Crampton, 2001 |
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| Valid name |
Gymnotus jonasi Albert & Crampton, 2001 |
| Synonyms |
- |
| IUCN Red List status (2014) |
Least Concern (LC) |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Gymnotiformes; Gymnotoidei; Gymnotidae. |
| Geographical distribution |
Brazil |
| Occurrence |
native: Brazil |
| Remarks |
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| Karyological information |
| Geographical area of study |
Floodplain channels and lakes in the Mamiraua´ Sustainable Development Reserve (Mamiraua´ Reserve), Amazonas, Brazil |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
2 (females) |
| Diploid chromosome number |
52 |
| Karyotype formula |
12 m/sm+40st/a |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
The constitutive heterochromatin (CH) observed in the pericentromeric regions of the majority of the chromosome pairs. The Ag-NORs revealed by 18S rDNA sites and CMA3 staining were located on the long arm of pairs 9 and 10, and on the short arm of pair 11. |
| Reference |
Milhomem SSR, Crampton WGR, Pieczarka JC, Silva DDS, Cardoso AL, da Silva PC, de Oliveira JA, Nagamachi CY (2012). Chromosomal and electric signal diversity in three sympatric electric knifefish species (Gymnotus, Gymnotidae) from the Central Amazon Floodplain. Reviews in Fish Biology and Fisheries, 22:485–497. |
| Cross Link |