Mesozoic origin for West Indian insectivores
Mesozoic origin for West Indian insectivores
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DOI：
10.1038/nature02597
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发表时间：
2004-06-10
期刊：
影响因子：
64.8
通讯作者：
Murphy, WJ
中科院分区：
文献类型：
--
作者：
Roca, AL;Bar-Gal, GK;Murphy, WJ
高度濒危的Solenodons，古巴特有的（Solenodon cubanus）和Hispaniola（S。paradoxus），包括西印度群岛食虫动物中仅存的两个物种（1，2）。组合的基因序列（13.9个酶）从S。paradoxus的研究表明，在7600万年前的白垩纪，solenodons从其他eulipotyphlan食虫动物中分化出来，这与地理分布一致，但也与扩散相一致。本文报道了一个1.6酶的线粒体DNA序列。cubanus与同属的S相比，有2500万年的深刻分歧。paradoxus，这是一致的替代起源的构造力量分开古巴和伊斯帕尼奥拉岛（3，4）。努力防止灭绝的两个幸存的solenodon物种将保护整个谱系一样古老或比许多哺乳动物的订单。
The highly endangered solenodons, endemic to Cuba ( Solenodon cubanus) and Hispaniola ( S. paradoxus), comprise the only two surviving species of West Indian insectivores(1,2). Combined gene sequences (13.9 kilobases) from S. paradoxus established that solenodons diverged from other eulipotyphlan insectivores 76 million years ago in the Cretaceous period, which is consistent with vicariance, though also compatible with dispersal. A sequence of 1.6 kilobases of mitochondrial DNA from S. cubanus indicated a deep divergence of 25 million years versus the congeneric S. paradoxus, which is consistent with vicariant origins as tectonic forces separated Cuba and Hispaniola(3,4). Efforts to prevent extinction of the two surviving solenodon species would conserve an entire lineage as old or older than many mammalian orders.