namanereidae(多毛目:neididae科)。第2部分。进化枝的生物地理学

C. Glasby
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引用次数: 30

摘要

对Namanereidinae进行了一项进化生物地理学研究,以测试该物种所显示的生物地理模式是否可以用变异来解释,以及它们是否支持泛古大陆分裂和假设的特提斯海的传统观点。namanereidae由Namalycastis和Namanereis两个单系分支组成,它们的成员表现出相似的分布模式。如果Namalycastis和Namanereis物种具有共同的破碎化和多样化历史,那么它们的面积枝状图应该与假定的地质破碎化序列一致。使用COMPONENT程序(Page, 1993)评估了区域梯形图之间以及分类单元和区域梯形图之间的一致性。结果表明,两属物种所表现出的生物地理格局在很大程度上可以用变异来解释。而不是支持盘古大陆分裂和假设的特提斯海的传统观点,结果更好地解释了扩展地球模型(sensu Shields, 1976,1979),该模型预测在侏罗纪时期地球实质上更小,特提斯海大大减少(或没有),太平洋基本上是封闭的。这个亚家族的最小年龄被认为是200岁左右。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Namanereidinae (Polychaeta: Nereididae). Part 2. Cladistic biogeography
A cladistic biogeographic study of the Namanereidinae was under taken to test whether the biogeographic patterns shown by the species can be explained by vicariance, and whether they support the conventional view of Pangaean break-up and a hypothetical Tethys Sea. The Namanereidinae consists of two monophyletic clades, Namalycastis and Namanereis, members of which exhibit similar distribution patterns. If species of Namalycastis and Namanereis share a common history of fragmentation and diversification then their area cladograms should be congruent and congruent with the postulated sequence of geological fragmentation. Congruence between area cladograms and between taxon and area cladograms was assessed using the COMPONENT program (Page, 1993). Results indicate that the biogeographic patterns shown by species of both genera may be explained largely by vicariance. Rather than supporting the conventional view of Pangaean break-up and a hypothetical Tethys Sea, the results are better explained by the expanding earth model (sensu Shields, 1976, 1979) which predicts that during the Jurassic Period the earth was substantially smaller, the Tethys Sea was much reduced (or absent) and the Pacific was essentially closed. The minimum age of the subfamily is thought to be about 200 My.
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