Evolutionary relationships within the Avalonian Ediacara biota: new insights from laser analysis
Evolutionary relationships within the Avalonian Ediacara biota: new insights from laser analysis
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DOI：
10.1144/0016-76492008-011
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发表时间：
2009-03-01
影响因子：
2.7
通讯作者：
Antcliffe, Jonathan B.
中科院分区：
文献类型：
--
作者：
Brasier, Martin D.;Antcliffe, Jonathan B.
我们报告新的高分辨率激光扫描的模式材料的最早的，复杂的埃迪卡拉属Charnia，Bradgatia，Charniodiscus和Ivesheadia从Charnwood，英国，并比较这些与Beothukis mistakensis gen. et sp. nov.和最近描述的分类群Charnia wardi，Charnia antecedens和Fractofusus。spp.来自纽芬兰的大致同时代地层我们使用激光和其他技术来映射这些埃迪卡拉纪rangeomorphs之间的形态的相似性和差异。建议的主要功能，包括增长轴的数量，数量和位置的增长唇，辐射或subparallel轴的存在下的第一和更高的阶分支，显示或未显示的叶状'rangeomorph'架构的程度，和这些叶状元素的边缘卷起的程度。这些功能，然后被用来提出建议这些类群之间的同源性，导致阿瓦隆埃迪卡拉生物群的进化的初步系统发育假说。
We report new high-resolution laser scanning of the type material for the earliest, complex Ediacaran genera Charnia, Bradgatia, Charniodiscus and Ivesheadia from Charnwood, UK, and compare these with Beothukis mistakensis gen. et sp. nov. and the recently described taxa Charnia wardi, Charnia antecedens and Fractofusus. spp. from broadly coeval strata in Newfoundland. We use the laser and other techniques to map the similarities and differences in morphology between these Ediacaran rangeomorphs. Key features are suggested to include the number of growth axes, the number and placement of growth lips, the presence of radiating or subparallel axes for the first- and higher-order branches, the extent of displayed or undisplayed leaf-like 'rangeomorph' architecture, and the extent of furling of the margins of these leaf-like elements. These features ire then used to propose Suggested homologies between these taxa, leading to a preliminary phylogenetic hypothesis for the evolution of the Avalonian Ediacara biota.