Jurassic radiation of large Branchiopoda (Arthropoda : Crustacea) using secondary structure-based phylogeny and relaxed molecular clocks
Jurassic radiation of large Branchiopoda (Arthropoda : Crustacea) using secondary structure-based phylogeny and relaxed molecular clocks
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DOI：
10.1080/10020070612330095a
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
S. Xiaoyan;Yang Qun;Shen Yan-bin
中科院分区：
文献类型：
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作者：
S. Xiaoyan;Yang Qun;Shen Yan-bin
摘要大型鳃足类的系统发育关系一直是甲壳类研究中最具争议的问题之一。本研究试图通过分析壳肢介类和无肢介类线粒体12S和核18S基因的核糖体RNA序列来解决它们的系统进化问题。系统发育树重建这些数据从27一般属于18个家庭，使用最大简约程序，最大似然，贝叶斯分析加上马尔可夫链蒙特卡罗（MCMC）技术下的混合和双重模型。结果表明，双甲纲（叶甲纲+枝角目）为一单系类群，刺尾目和枝角形目为姐妹类群，Laevicaudata为双甲纲的基底类群，背甲纲和双甲纲为一单系叶足纲。在双甲纲中，叶甲纲是并系的，这与传统的系统分类不同。宽松的分子钟分析，使用多个化石C...
Abstract The phylogenetic relationships of large Branchiopoda have been one of the most controversial issues in the studies of Crustcea. This study attempts to tackle systematic problems concerning conchostracan and anostracan evolution, by analyzing ribosomal RNA sequences of both mitochondrial (12S) and nuclear genes (18S). Phylogenetic trees are reconstructed with these data from 27 general belonging to 18 families, using maximum parsimony procedures, maximum likelihood, and Bayesian analysis coupled with Markov chain Monte Carlo (MCMC) techniques under mixed and doublet models. The results suggest that Diplostraca (Conchostraca + Cladocera) form a monophyletic group, with Spincaudata and Cladoceromorpha being sister groups and Laevicaudata a basal lineage of Diplostraca; Notostraca and Diplostraca together from the monophyletic Phyllopoda. Within Diplostraca, Conchostraca is paraphyletic in contrast to the traditional systematic classification. Relaxed molecular clock analysis, using multiple fossil c...