THE AFRICAN NANNOMYS (MURIDAE): AN EARLY OFFSHOOT FROM THE MUS LINEAGEâEVIDENCE FROM scnDNA HYBRIDIZATION EXPERIMENTS AND COMPARED MORPHOLOGY
äºIsrael Journal of Ecology and EvolutionSearch for other papers by CATZEFLIS FRANÃOIS M. in
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The systematics of the African pigmy mice Nannomys is studied through molecular and morphological approaches. Molecular data based on single-copy nuclear DNA (scnDNA) hybridization indicate that Nannomys is as divergent from Mus sensu stricto as is the Asian subgenus Coelomys; moreover, it shows a much closer relationship to Mus than to any other African, Oriental, or Palearctic murid genus tested so far. Furthermore, when using a molecular clock calibrated by Mus/Rattus split, estimated by paleontologists at about 10 million years ago, it appears that the separation between Nannomys and the Mus lineage occurred about 5 million years ago, a date which could indicate the earliest entry of the ancestors of Nannomys in Africa. Morphological investigations indicate that it is almost impossible to distinguish between Nannomys sp. and some similar Asian Mus species. These results suggest that Nannomys and their Oriental relatives have a common ancestor either in Africa or in Asia, or else have developed a parallel evolution, as seen in many other rodent groups.
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THE AFRICAN NANNOMYS (MURIDAE): AN EARLY OFFSHOOT FROM THE MUS LINEAGEâEVIDENCE FROM scnDNA HYBRIDIZATION EXPERIMENTS AND COMPARED MORPHOLOGY
äºIsrael Journal of Ecology and EvolutionSearch for other papers by CATZEFLIS FRANÃOIS M. in
Current site
Google Scholar
PubMed
Search for other papers by CHRISTIANE DENYS in
Current site
Google Scholar
PubMed
The systematics of the African pigmy mice Nannomys is studied through molecular and morphological approaches. Molecular data based on single-copy nuclear DNA (scnDNA) hybridization indicate that Nannomys is as divergent from Mus sensu stricto as is the Asian subgenus Coelomys; moreover, it shows a much closer relationship to Mus than to any other African, Oriental, or Palearctic murid genus tested so far. Furthermore, when using a molecular clock calibrated by Mus/Rattus split, estimated by paleontologists at about 10 million years ago, it appears that the separation between Nannomys and the Mus lineage occurred about 5 million years ago, a date which could indicate the earliest entry of the ancestors of Nannomys in Africa. Morphological investigations indicate that it is almost impossible to distinguish between Nannomys sp. and some similar Asian Mus species. These results suggest that Nannomys and their Oriental relatives have a common ancestor either in Africa or in Asia, or else have developed a parallel evolution, as seen in many other rodent groups.
| å ¨é¨æé´ | è¿å»ä¸å¹´ | è¿å»30天 | |
|---|---|---|---|
| æè¦æµè§æ¬¡æ° | 209 | 34 | 4 |
| å ¨ææµè§æ¬¡æ° | 8 | 0 | 0 |
| PDFä¸è½½æ¬¡æ° | 7 | 0 | 0 |
