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首页> 外文期刊>Journal of Paleontology >PHYLOGENETIC AND BIOGEOGRAPHIC ANALYSIS OF DEIPHONINE TRILOBITES
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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,以得出该组的关系假设。发现Deiphon Barrande属(1850年)和Onycopyge Woodward(1880年)是单系的,而如前所定义的Sphaerocoryphe Angelin属(1854年)是近缘的。使用系统发育假设进行的改进的Brooks Parsimony分析揭示了奥陶纪-lur陵纪期间的生物地理学模式,尤其是变异性和地域分散性。该分析得出了有关地音宁生物地理的三个主要结论:东奥伦西亚和波罗的海在奥陶纪晚期距离足够近,可以通过海平面的上升和下降来交换分类群。西北劳伦西亚和澳大利亚之间发生了机会分散;地弗宁三叶虫可能起源于波罗的海或东洛伦西亚。

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