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本文报道了在中国云南东部晋宁、江川地区的震旦(Ediacaran)系顶部渔户村组旧城段新发现的龙凤山藻科(Longfengshaniaceae)化石,与华北燕山地区新元古代青白口系长龙山组及北美中元古代小达尔群产出的Longf engshania化石明显不同,叶状体形态更为多样,呈梭形、枣核形、铲形、长条带形或球囊形等,拟茎较粗壮,与叶状体的接合很平缓,部分可见盘状、短茎状、披针状固着构造和叶状体萌生现象。依据形态记述了2属6种,包括1新属2新种3相似种,讨论和修订了龙凤山藻的科、属特征。华南滇东地区这些宏体藻类化石的发现进一步表明震旦(Ediacaran)纪末期也存在后生植物的多样化发展,可能为早寒武世“澄江生物群”的爆发性演化奠定了生态基础。
This paper reports the discovery of the newly discovered Longfengshaniaceae fossils in the old section of the Ediacaran Formation in the Jinning and Jiangchuan areas of eastern Yunnan, China, and the long Paleocene The Longfengshanshan fossils from the Longshan Formation and the Middle Proterozoic Small Dalphas in North America are obviously different in shape. The fronds are more diverse in form of fusiform, jujube, spade, long strip or balloon, Coarser, with the frond engagement is smooth, partially visible disk, short stem, lanceolate fixation structure and fronds fronds phenomenon. According to the morphological description of 2 genera and 6 species, including 1 new genera 2 new species 3 similar species, discuss and revise the dragon and mountain shan families, is a feature. The discovery of these macroalgae algae fossils in eastern Yunnan shows that there is also a great diversity of metazoans in the late Ediacaran, which may provide the ecological basis for the explosive evolution of the Early Cambrian “Chengjiang biota.”