Molecular and fossil evidence place the origin of cichlid fishes long after Gondwanan rifting.
Molecular and fossil evidence place the origin of cichlid fishes long after Gondwanan rifting.
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DOI：
10.1098/rspb.2013.1733
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发表时间：
2013-11-07
期刊：
影响因子：
--
通讯作者：
Near TJ
中科院分区：
文献类型：
--
作者：
Friedman M;Keck BP;Dornburg A;Eytan RI;Martin CH;Hulsey CD;Wainwright PC;Near TJ
慈鲷鱼是适应性辐射、物种形成和进化发育生物学研究中的关键模型系统。超过 1600 种慈鲷栖息在南部几块陆地的淡水和边缘海洋环境中。这种分布模式，加上丽鱼科动物系统发育与中生代大陆裂谷序列之间的相似性，导致了广泛接受的假设，即丽鱼科鱼是一个古老的类群，其主要生物地理模式源于冈瓦纳大陆的变化。尽管现存慈鲷的分异模型所要求的早白垩世（约 135 Ma）现在代表了硬骨鱼分子钟的关键校准，但这种假定的分裂比最古老的慈鲷化石早了近 90 Myr。在这里，我们提供了对慈鲷起源时间的独立古生物学和宽松分子钟估计，这些估计共同拒绝了冈瓦纳大陆变异情景所要求的该群体的古老性。慈鲷化石层位的分布、地层上一致的慈鲷外群谱系的年龄以及由 10 个核基因组成的 DNA 序列数据集的松弛时钟分析，所有这些都提供了以古新世（约 65-57 Ma）为中心的冠慈鲷起源的重叠估计，基本上晚于冈瓦纳大陆的构造破碎。我们的研究结果为慈鲷提供了修订后的宏观进化时间尺度，暗示了传播在产生这一重要模型分支的观察到的地理分布中的作用，并增加了对历史生物地理学的替代范式的主导地位的日益激烈的争论。
Cichlid fishes are a key model system in the study of adaptive radiation, speciation and evolutionary developmental biology. More than 1600 cichlid species inhabit freshwater and marginal marine environments across several southern landmasses. This distributional pattern, combined with parallels between cichlid phylogeny and sequences of Mesozoic continental rifting, has led to the widely accepted hypothesis that cichlids are an ancient group whose major biogeographic patterns arose from Gondwanan vicariance. Although the Early Cretaceous (ca 135 Ma) divergence of living cichlids demanded by the vicariance model now represents a key calibration for teleost molecular clocks, this putative split pre-dates the oldest cichlid fossils by nearly 90 Myr. Here, we provide independent palaeontological and relaxed-molecular-clock estimates for the time of cichlid origin that collectively reject the antiquity of the group required by the Gondwanan vicariance scenario. The distribution of cichlid fossil horizons, the age of stratigraphically consistent outgroup lineages to cichlids and relaxed-clock analysis of a DNA sequence dataset consisting of 10 nuclear genes all deliver overlapping estimates for crown cichlid origin centred on the Palaeocene (ca 65–57 Ma), substantially post-dating the tectonic fragmentation of Gondwana. Our results provide a revised macroevolutionary time scale for cichlids, imply a role for dispersal in generating the observed geographical distribution of this important model clade and add to a growing debate that questions the dominance of the vicariance paradigm of historical biogeography.
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影响因子：
3.9
作者：
Jokat, W;Boebel, T;Meyer, U
通讯作者：
Meyer, U
影响因子：
2.6
作者：
Loss-Oliveira, Leticia;Aguiar, Barbara O.;Schrago, Carlos G.
通讯作者：
Schrago, Carlos G.
DOI：
10.1073/pnas.1112487109
发表时间：
2012-04-03
影响因子：
11.1
作者：
Crottini, Angelica;Madsen, Ole;Vences, Miguel
通讯作者：
Vences, Miguel
DOI：
10.1371/currents.tol.53ba26640df0ccaee75bb165c8c26288
发表时间：
2013-01-01
期刊：
PLOS CURRENTS-TREE OF LIFE
影响因子：
--
作者：
Betancur-R, Ricardo;Broughton, Richard E.;Orti, Guillermo
通讯作者：
Orti, Guillermo
影响因子：
1.4
作者：
Malabarba, Maria C.;Malabarba, Luiz R.;Del Papa, Cecilia
通讯作者：
Del Papa, Cecilia