General information |
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| Paratrygon aiereba (Muller & Henle, 1841) | ||
| Common name | Discus ray, Arraia | |
| Synonyms |
Trygon aiereba Muller & Henle, 1841 Raja ajereba Walbaum, 1792 Paratrygon ajereba (Walbaum, 1792) Paratrygon aiereba (Walbaum, 1792) Trygon strogylopterus Jardine, 1843 Disceus thayeri Garman, 1913 |
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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; Chondrichthyes; Elasmobranchii; Batoidea; Myliobatiformes; Potamotrygonidae. |
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| Geographical distribution | Brazil; Peru; Venezuela; Ecuador |
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| Occurrence | Native: Brazil, Peru, Venezuela, Ecuador |
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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 | Daraqua, Itu, Ariraha rivers; Zamula stream,middle Negro River, Barcelos, Amazonas, Manaus | |
| Source of chromosomes | Kidney,epigonal organ and spleen |
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| Number of specimens with sex | 04 (02 males; 02 females) |
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| Diploid chromosome number | 90 |
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| Karyotype formula | 4M+2SM+10ST+74A |
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| Fundamental arm number | 106 |
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| Chromosome length | Not reported |
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| Sex chromosome | Not detected |
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| Chromosome staining/banding/FISH | Three NOR-bearing sites were detected |
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| Reference(s) |
Valentim FC, Falcao JN, Porto JIR, Feldberg E (2006). Chromosomes of three freshwater stingrays (Rajiformes Potamotrygonidae) from the Rio Negro basin, Amazon, Brazil. Genetica,128:33-39. |
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