Palaeontological and molecular arguments for the origin of silica-secreting marine organisms
Palaeontological and molecular arguments for the origin of silica-secreting marine organisms
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DOI：
10.1016/j.crpv.2004.01.005
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发表时间：
2004-05
影响因子：
1.1
通讯作者：
T. Danelian;D. Moreira
中科院分区：
文献类型：
--
作者：
T. Danelian;D. Moreira
一些原始的早古生代放射虫与硅质海绵在形态上的相似性引发了一个有趣的问题，即它们可能的系统发育相似性。在这里，我们通过对一些分泌二氧化硅的海洋生物的现有分子证据的分析来解决这个问题。所获得的系统发育树不支持上述假说，但支持棘类和多囊类放射虫的单系性。已知最古老的硅质化石的记录提供了分子树状图的时间校准，并使我们能够提出几个非化石类群起源的可能年龄。引用本文：T.Danelian，D.Moreira，C.R.Palevol 3(2004)。
The morphological resemblance of some primitive Early Palaeozoic Radiolaria with siliceous sponges has raised the intriguing question of their possible phylogenetic affinity. Here, we address this question through the analysis of available molecular evidence for a number of silica-secreting marine organisms. The obtained phylogenetic tree does not support the above hypothesis, but it suggests the monophyly of Acantharian and Polycystine Radiolaria. The record of the oldest known siliceous fossils provides a time calibration of the molecular dendrograms and allows us to suggest likely ages for the origin of several non-fossilizable groups. To cite this article: T. Danelian, D. Moreira, C. R. Palevol 3 (2004).