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首页> 外文期刊>Polar biology >Evolutionary history of Southern Ocean Odontaster sea star species (Odontasteridae; Asteroidea)
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Evolutionary history of Southern Ocean Odontaster sea star species (Odontasteridae; Asteroidea)

机译：南方大洋龙牙海星物种的进化史（Odontasteridae; Asteroidea）

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摘要

We investigated the recent evolutionary history of demersal sea stars in the genus Odontaster throughout the Western Antarctic waters and on the South American shelf. The mitochondrial 16S ribosomal and cytochrome c oxidase subunit I (COI) genes were sequenced from adult and larval specimens. TCS parsimony network analysis and Bayesian inference were used to examine evolutionary history. Hierarchical AMOVA and mitochondrial DNA diversity statistics were also computed. Additionally, morphological characters were used. In assessing O. validus, we discovered morphological and range descriptions of Odontaster species to be inaccurate and include other Odontaster species in the Southern Ocean. We found O. meridionalis on both sides of the Antarctic circumpolar current (ACC) and Antarctic polar front (APF), whereas O. validus and O. penicillatus do not appear to have permeated these oceanographic features. Additionally, we discovered previously unrecognized species of Odontaster. Subsequent examination revealed diagnostic morphological differences in the number of spinelets on the abactinal and actinal plates. Mitochondrial characterization of Odontaster species suggests their recent history has been influenced by the APF and ACC in different ways. With the exception of O. meridionalis, Odontaster species are restricted to either side of the Drake Passage. O. validus shows genetic connectivity throughout sampled Antarctic waters.
机译：我们调查了整个南极西部水域和南美大陆架上的Odontaster属中近海海星的最新进化史。线粒体16S核糖体和细胞色素c氧化酶亚基I（COI）基因从成年和幼虫标本进行测序。 TCS简约网络分析和贝叶斯推断被用来检查进化史。还计算了等级AMOVA和线粒体DNA多样性统计数据。另外，使用形态特征。在评估O.validus时，我们发现了Odontaster种类的形态和范围描述不准确，并且包括了南大洋中的其他Odontaster种类。我们在南极环流（ACC）和南极极锋（APF）的两侧都发现了子午线虫（O. meridionalis），而O.validus和O. penicillatus似乎并未渗透这些海洋学特征。此外，我们发现了以前无法识别的Odontaster物种。随后的检查显示，在细菌和肌动板上的脊柱数量存在诊断形态学差异。 Odontaster物种的线粒体特征表明它们的近来历史已受到APF和ACC的不同影响。除O. meridionalis外，Odontaster物种仅限于德雷克海峡的两侧。 O.validus显示整个采样南极水域的遗传连通性。

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  • 来源
    《Polar biology》 |2011年第4期|p.575-586|共12页
  • 作者

    Alexis M. Janosik; Andrew R. Mahon; Kenneth M. Halanych;

  • 作者单位

    Department of Biological Sciences, Auburn University,101 Rouse Life Sciences Building, Auburn, AL 36849, USA;

    Department of Biological Sciences, Auburn University,101 Rouse Life Sciences Building, Auburn, AL 36849, USA,Centre for Aquatic Conservation, Department of Biological Sciences, University of Notre Dame, Notre Dame,IN 46556, USA;

    Department of Biological Sciences, Auburn University,101 Rouse Life Sciences Building, Auburn, AL 36849, USA;

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  • 正文语种 eng
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  • 关键词

    16S rDNA; COI mtDNA; Antarctic circumpolar current; Antarctic polar front; Odontaster; Phylogeography;

    机译：16S rDNA;COI mtDNA;南极绕极电流;南极极锋;Odontaster;植志;

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