Karyological Studies of South American Rodents (Rodentia:Cricetidae) : I. Comparative Chromosomic Analysis in <i>Scapteromys</i> Taxa
South American rodents of the genus <i>Scapteromys</i>, are know to exist in a number of different chromosomal forms. <i>S. tumidus</i> has 2n = 24 from Uruguay while three different Brazilian taxa, all referred to as <i>S. tumidus</i> have respectively 2n = 36,34...
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| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1986
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/122869 |
| Aporte de: |
| Sumario: | South American rodents of the genus <i>Scapteromys</i>, are know to exist in a number of different chromosomal forms. <i>S. tumidus</i> has 2n = 24 from Uruguay while three different Brazilian taxa, all referred to as <i>S. tumidus</i> have respectively 2n = 36,34 and 24. S. aquaticus from Argentina has 2n–32. By G- band comparisons we find that the 2n = 24 <i>S. tumidus</i> from Uruguay and Brazil are chromosomically more closely related to <i>S. aquaticus</i> from Argentina than to alleged <i>S. tumidus</i> with 2n = 34–36 from Brazil. These results suggest that the latter may represent a new, still undescribed, species. |
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