Ancient single origin for Malagasy primates.
Ancient single origin for Malagasy primates.
复制标题
马达加斯加灵长类动物的古代单一起源。
DOI：
10.1073/pnas.93.10.5122
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发表时间：
1996
影响因子：
11.1
通讯作者：
R. Vilgalys
中科院分区：
文献类型：
--
作者：
Anne D. Yoder;Matt Cartmill;M. Ruvolo;Kathleen K. Smith;R. Vilgalys
我们报告的新证据对灵长类系统学中长期存在的争议具有决定性意义。完整细胞色素 b 基因的 DNA 序列数据与扩展的形态学数据集相结合，证实了先前研究的结果，并再次表明所有现存的马达加斯加狐猴都起源于一个共同的祖先。这些结果以及其他遗传学研究的结果要求对灵长类动物分类进行修订，其中矮狐猴和鼠狐猴被归入非洲-亚洲懒猴类。系统发育结果与古大陆数据一致，表明狐猴和懒猴（链鼻猴）的共同祖先起源于非洲。分子数据进一步表明了一个令人惊讶的结论：狐猴最晚在始新世早期就开始独立进化。这表明马达加斯加灵长类动物谱系比一般认为的更古老，并且两个链球菌谱系之间的分裂早在已知的始新世灵长类化石出现之前就已经存在。我们得出的结论是，灵长类动物的起源以古新世晚期之前的某个时间的快速物种形成和多样化为标志。
We report new evidence that bears decisively on a long-standing controversy in primate systematics. DNA sequence data for the complete cytochrome b gene, combined with an expanded morphological data set, confirm the results of a previous study and again indicate that all extant Malagasy lemurs originated from a single common ancestor. These results, as well as those from other genetic studies, call for a revision of primate classifications in which the dwarf and mouse lemurs are placed within the Afro-Asian lorisiforms. The phylogenetic results, in agreement with paleocontinental data, indicate an African origin for the common ancestor of lemurs and lorises (the Strepsirrhini). The molecular data further suggest the surprising conclusion that lemurs began evolving independently by the early Eocene at the latest. This indicates that the Malagasy primate lineage is more ancient than generally thought and places the split between the two strepsirrhine lineages well before the appearance of known Eocene fossil primates. We conclude that primate origins were marked by rapid speciation and diversification sometime before the late Paleocene.