| General information |
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Potamotrygon motoro (J. P. Muller & Henle, 1841) |
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| Common name | South American freshwater stingray, Arraia de fogo |
| Synonyms |
Taeniura motoro Muller & Henle, 1841 Trygon garrapa Jardine, 1843 Trygon mulleri Castelnau, 1855 Potamotrygon circularis Garman, 1913 Potamotrygon laticeps Garman, 1913 Paratrygon laticeps (Garman, 1913) Potamotrygon pauckei Castex, 1963 Potamotrygon alba Castex, 1963 Potamotrygon labradori Castex, 1963 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Chondrichthyes; Elasmobranchii; Batoidea; Myliobatiformes; Potamotrygonidae. |
| Geographical distribution |
Brazil; Argentina; Colombia; Peru; Uruguay |
| Occurrence |
native: Brazil; native: Argentina; native: Colombia; native: Peru; native: Uruguay |
| Importance |
Food |
| Karyological information |
| Record 1 |
| Geographical area of study |
Parana river at Ituzaingo and Garape (Province of Corrientes, Argentina); Posadas (Province of Misiones, Argentina) |
| Source of chromosomes |
Lymphocyte cultures |
| Number of specimens with sex |
15(07 males; 08 females) |
| Diploid chromosome number |
66 |
| Karyotype formula |
14M + 16SM + 22ST + 14A (Females) 13M + 15SM +23ST |
| Fundamental arm number |
118 (Females);116 (Males) |
| Chromosome length |
Not reported |
| Sex chromosome |
Not detected |
| Chromosome staining/banding/FISH |
Heterochromatin was distributed at the pericentromeric regions |
| Reference |
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. |
| Record 2 |
| Geographical area of study |
Daraqua, Itu, Ariraha rivers; Zamula stream,middle Negro River, Barcelos, Amazonas, Manaus |
| Source of chromosomes |
Kidney,epigonal organ and spleen |
| Number of specimens with sex |
21 (07 males; 14 females) |
| Diploid chromosome number |
66 |
| Karyotype formula |
18M+12SM+10ST+26A |
| Fundamental arm number |
106 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not detected |
| Chromosome staining/banding/FISH |
NORs located in terminal regions up to seven chromosomes |
| Reference |
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. |
| Cross Link |