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''Nilssonia'' is a genus of softshell turtles (family Trionychidae) from rivers, streams, ponds, and lakes in South Asia and Burma. In many treatments, it is monotypic, with the single species Burmese peacock softshell (''N. formosa''). However, the supposed other genus of peacock softshells, ''Aspideretes'', is more closely related to ''N. formosa'' than had been believed. They differ only in the neural plates between the first pleural scale pair of the bony carapace, which are fused into one in ''N. formosa'' and unfused in the others.〔 (2007): Genetic evidence for wild-living ''Aspideretes nigricans'' and a molecular phylogeny of South Asian softshell turtles (Reptilia: Trionychidae: ''Aspideretes, Nilssonia''). ''Zool. Scripta'' 36(4): 301–310. (HTML abstract)〕 Thus, it has been proposed to unite the two genera under the older name, ''Nilssonia''. As it seems, the closest living relatives of the Burmese peacock softshell are the Indian softshell turtle (''A./N. gangeticus'') and the Leith's softshell turtle (''A./N. leithii''), making the merging of the genera well warranted.〔〔Turtle Taxonomy Working Group (Dijk , P.P., Iverson, J.B., Shaffer, H.B., Bour, R., and Rhodin, A.G.J. ). 2012. Turtles of the world, 2012 update: annotated checklist of taxonomy, synonymy, distribution, and conservation status. Chelonian Research Monographs No. 5, pp. 000.243–000.328, doi:10.3854/crm.5.000.checklist.v5.2012, ().〕 ==Species== If the genera are united, the five species are: *Burmese peacock softshell or Burmese softshell turtle ''N. formosa'' (Gray, 1869) *Indian softshell turtle or Ganges softshell turtle ''N. gangetica'' (Cuvier, 1825) *Indian peacock softshell turtle ''N. hurum'' (Gray, 1831) *Leith's softshell turtle or Nagpur softshell turtle ''N. leithii'' (Gray, 1872) *Black softshell turtle or Bostami turtle ''N. nigricans'' (Anderson, 1875) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nilssonia (turtle)」の詳細全文を読む スポンサード リンク
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