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丘尔藻Chuaria Walcott,1899是宏观藻类中研究最早、延续时限最长的一类宏观藻类化石,它是新元古代赵家山生物群、淮南生物群及西陵峡动物群的代表分子之一。寒武纪第3世凯里生物群中Chuaria化石的产出,不仅是其最年青的代表,也是凯里生物群中宏观藻类组合中较为重要的分子之一。凯里生物群中Chuaria化石呈黑色、深褐色圆—椭圆盘状炭质薄膜,轮廓清晰,边缘圆滑,无皱纹或环纹,边缘内侧盾面光滑,与元古代Chuaria化石特征极为相似。生物圈的面貌在进入寒武纪之后发生了非常迅速的显著变化,藻类的演化也是如此,但是Chuaria显然是个例外,其形态特征没有多大变化,表明它具有较强的生存竞争能力以及遗传上的稳定性、演化上的保守性和环境上的适应性。Chuaria在寒武纪第3世凯里生物群中的产出对研究Chuaria化石及早期多细胞宏观藻类的演化具有重要的意义。
Chuaria Walcott, 1899 is one of the earliest macro macroscopic algal fossils in macroscopic algae. It is one of the representatives of the Neoproterozoic Zhaojiashan biota, Huainan biota and Xiling gorge fauna. The output of Chuaria fossils in the 3rd Cambrian biota is not only the youngest representative, but also one of the more important molecules in the macroscopic algae assemblage in the Kaili biota. The Chuaria fossils in the Kaili biota are black and dark brown round-oval disk-shaped carbonaceous films with clear outline, smooth edges, no wrinkles or rings, and smooth edges inside the shield, closely resembling the features of the Proterozoic Chuaria fossils. The landscape of the biosphere changed very rapidly and dramatically after the Cambrian evolution, as did the evolution of algae, but Chuaria, with the notable change in morphological characteristics, clearly showed that it had a strong viability and a genetic stability Sexual, evolutionary conservation and environmental adaptability. The output of Chuaria in the third Cambrian Kaili biota is of great significance for studying the evolution of Chuaria fossils and early multicellular macrophytes.