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PHYLOGENETIC AND BIOGEOGRAPHIC ANALYSIS OF DEIPHONINE TRILOBITES

机译:己糖三环体的系统发育和生物地理学分析

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摘要

Cladistic parsimony analysis of the subfamily Deiphoninae Raymond, 1913 was conducted to produce a hypothesis of relationship for the group. The genera Deiphon Barrande, 1850 and Onycopyge Woodward, 1880 are found to be monophyletic, while the genus Sphaerocoryphe Angelin, 1854, as it was previously defined, is paraphyletic. A modified Brooks Parsimony Analysis using the phylogenetic hypothesis reveals patterns of biogeography, in particular, vicariance and geodispersal, during the Ordovician-Silurian. The analysis yields three major conclusions about deiphonine biogeography: Eastern Laurentia and Baltica were close enough during the late Ordovician to exchange taxa via sea level rise and fall; chance dispersal occurred between Northwestern Laurentia and Australia; and deiphonine trilobites likely originated in Baltica or Eastern Laurentia.
机译:进行了1913年Deiphoninae Raymond子家族的简约主义分析,得出了 群体的关系假设。发现1818年的Deiphon Barrande属和1880年的Onycopyge Woodward属是单系的,而先前定义的Sphaerocoryphe Angelin属是近缘的。 使用系统发生学假说进行的布鲁克斯简约分析显示了奥陶纪-lur流时期生物地理学的模式,尤其是 的方差和地域分散。 该分析得出三个有关地苯丙氨酸生物地理学的主要结论:在晚期奥陶纪时期,东劳伦西亚和波罗的海距离足够近,可以通过海平面的上升和下降交换分类群。西北劳伦西亚 与澳大利亚之间发生了机会分散;和地弗宁三叶虫可能起源于 Baltica或Eastern Laurentia。

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  • 来源
    《Journal of Paleontology》 |2010年第1期|128-136|共9页
  • 作者单位

    Department of Geology and Natural History Museum/Biodiversity Research Center, University of Kansas, 1475 Jayhawk Blvd., 120 Lindley Hall, Lawrence 66045;

    Department of Geology and Natural History Museum/Biodiversity Research Center, University of Kansas, 1475 Jayhawk Blvd., 120 Lindley Hall, Lawrence 66045;

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