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Northern sportive lemur : ウィキペディア英語版
Northern sportive lemur

The northern sportive lemur (''Lepilemur septentrionalis'') , also known as the Sahafary sportive lemur or northern weasel lemur, is a species of lemur in the family Lepilemuridae. It is endemic to Madagascar. As a result of severe ecological and human pressures, the lemur is classified as Critically Endangered (CR) by the IUCN Red List,〔 and is one of the world's most endangered primate species.
==Taxonomy==
The ''Lepilemur'' genus was initially thought to comprise only 2 species: ''L. mustelinus'' and ''L. ruficaudatus'', with the latter subdivided into 2 subspecies. The genus was later reclassified as having only 1 species, ''mustelinus'', with 5 subspecies. In 1977, Petter et al. increased the species number of the genus to 7, at which point the species ''L. septentrionalis'' was demarcated, and classified as having 4 subspecies. As 2 of these subspecies were not geographically distinct, the number of ''L. septentrionalis'' subspecies was eventually condensed to 2: ''L. s. septentrionalis'' and ''L. s. ankaranensis''. As a result of subsequent cytogenetic and molecular analyses, the 7 species of ''Lepilemur'' were confirmed by Rumpler et al., but the ''L. s. ankarensis'' subspecies was elevated to the status of full species, resulting in 8 species of lemur classified within the genus. A further three molecular genetic studies have led to the inclusion of another 15 species of ''Lepilemur'', making it the most diverse lemur genus at 23 species. In 2004, a study of the evolutionary relationships of various subpopulations of the northern sportive lemur was carried out, in which sequence analyses of the mitochondrial DNA of a large number of ''L. septentrionalis'' individuals from the different subpopulations were performed. A significant number of fixed differences present in the lemurs in the Sahafary region distinguished them from the lemurs in other regions, suggesting that the northern sportive lemur in fact exists as two separate cryptic species, most likely caused by chromosomal rearrangements in one of the ''L. septentrionalis'' evolutionary lineages.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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