Phylogeny and Divergence Times of Lemurs Inferred with Recent and Ancient Fossils in the Tree
Phylogeny and Divergence Times of Lemurs Inferred with Recent and Ancient Fossils in the Tree
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DOI：
10.1093/sysbio/syw035
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发表时间：
2016-09-01
影响因子：
6.5
通讯作者：
Davalos, Liliana M.
中科院分区：
文献类型：
--
作者：
Herrera, James P.;Davalos, Liliana M.
古生物学和新生物学系统学试图用不同的数据集来回答进化问题。结合现存和灭绝的类群推断的系统发育提供了新的见解生命的进化史。灵长类动物有着广泛多样的化石记录，关于现存和已灭绝分类群的分子数据正在迅速得到。我们使用了两个模型来推断生活和化石灵长类动物的生殖和分化时间，tip-dating（TD）和简化的出生-死亡过程（FBD）。我们收集了新的形态学数据，特别是关于马达加斯加现存和灭绝的特有狐猴。我们将形态学数据与已发表的DNA序列相结合，以推断接近完整的（88%的狐猴）时间校准的基因。结果表明，灵长类动物起源于白垩纪-第三纪的边界附近，比化石记录显示的略早，比以前仅从分子数据推断的要晚。我们推断灭绝狐猴之间的新关系，并强烈支持以前未解决的关系。与TD推断的日期显着老于与FBD推断，最有可能涉及到一个统一的分支过程中的TD的假设相比，在FBD假设的出生-死亡过程。这是第一个研究联合收割机的形态和DNA序列数据从灭绝和现存的灵长类动物推断进化关系和分歧的时间，我们的研究结果揭示了新的光狐猴进化的克里思和联合系统发育分析的有效性。
Paleontological and neontological systematics seek to answer evolutionary questions with different data sets. Phylogenies inferred for combined extant and extinct taxa provide novel insights into the evolutionary history of life. Primates have an extensive, diverse fossil record and molecular data for living and extinct taxa are rapidly becoming available. We used two models to infer the phylogeny and divergence times for living and fossil primates, the tip-dating (TD) and fossilized birth-death process (FBD). We collected new morphological data, especially on the living and extinct endemic lemurs of Madagascar. We combined the morphological data with published DNA sequences to infer near-complete (88% of lemurs) time-calibrated phylogenies. The results suggest that primates originated around the Cretaceous-Tertiary boundary, slightly earlier than indicated by the fossil record and later than previously inferred from molecular data alone. We infer novel relationships among extinct lemurs, and strong support for relationships that were previously unresolved. Dates inferred with TD were significantly older than those inferred with FBD, most likely related to an assumption of a uniform branching process in the TD compared with a birth-death process assumed in the FBD. This is the first study to combine morphological and DNA sequence data from extinct and extant primates to infer evolutionary relationships and divergence times, and our results shed new light on the tempo of lemur evolution and the efficacy of combined phylogenetic analyses.