多枝黄山藻(Huangshanophyton fluticulosum Chen,Lu and Xiao,1994)在凯里生物群中的发现

蓝田植物群处于宏观藻类第一个繁盛期的前期,化石类型丰富,属、种众多,形态结构复杂,具有明显的器官分化,是一个独具特色的植物群。其中多枝黄山藻Huangshanophyton fluticulosum Chen,Lu&Xiao,1994是最常见的分子之一。凯里生物群中的Huangshanophyton fluticulosum,与安徽蓝田组的模式标本相比,藻体形态一致,仅有细微差异,即扇形发散角较大,藻丝直径较小。从埃迪卡拉纪陡山沱期至寒武纪第3世(原中寒武世),经历了近5千多万年特别是埃迪卡拉纪末期的生物灭绝事件后,Huangshanophyton fluticulosum不仅安全渡过而且形态结构特征没有发生多少变化,说明该类生物具有较强的生存竞争能力,以及遗传上的稳定性、演化上的保守性和较强的环境适应性。

Huangshanophyton fluticulosum Chen, Lu & Xiao, 1994 (Algae) from the Kaili Biota, Guizhou Province, China

Lantian Flora is a unique flora which is the product of the first radiation of Metaphyta in the earth history. The well -preserved macroalgal fossils have complex structure and obvious organ differentiation. The Huangshanophyton Chen, Lu ＆ Xiao, 1994 （algae） is very common in the Edicaran age Lantian Flora, including one specie, H. fluticulosum Chen, Lu ＆ Xiao, 1994. Morphology Study of H. fluticulosum from the Kaili Biota and the Lantian Flora appears that the H. fluticulosum from the fomer have smaller size, larger fan - shaped divergence angle and smaller diameter of the filament. The Genus spans a range of about 50 Ma from the Ediacaran Doushantuoian to Cambrian Epoch 3. Huangshanophyton Chert, Lu ＆ Xiao, 1994 survived the extinction event of the terminal Ediacaran. Moreover, the characteristics of thallus morphology exhibit minimal change. Its survival probably indicates a wide ecological tolerance and flexibility and its conserved morphology may reflects a greater fitness for competition and a high degree of inherent genetic stability.