作　　者： ; ; ; ; ;

机构地区： 深圳仙湖植物园

出　　处： 《微体古生物学报》 2011年第2期181-191,共11页

摘　　要： 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 the earliest known macroalgae and have an extremely long geologic range.Chuaria circularis is the most important taxa found in the Zhaojiashan Biota,the Huainan Biota and the Xilingxia fauna.Some Chuaria circularis fossils occur in Series 3 of the Cambrian,representing the youngest known Chuaria and also one of the most important macroalgae of the Kaili Biota.The Chuaria circularis fossils from the Kaili Biota are black-brown carbonaceous films,circular to oval,outline clear,periphery smooth,no concentric ring,shield surface smooth,that is similar to the characteristics of the Chuaria circularis fossils from the Meso-Proterozoic.Chuaria circularis survived the extinction event of the terminal Ediacaran,however the characteristic of the thallus morphology exhibits minimal change,that probably indicates Chuaria circularis is a phytoplankton with a wide ecological tole-rance and flexibility and its conserved morphology may reflect a greater fitness for competition and a high degree of inherent genetic stability.The occurrence of Chuaria circularis from the Kaili Biota has some significance to the evolution research of the early macroalgae.

关 键 词： 凯里生物群 寒武纪第 世 贵州

领　　域： [天文地球] [生物学]