摘要
初步研究表明,留茶坡组中部黑色页岩中化石呈炭质压膜状保存,主要包括长绳状或带状宏观藻:Chenlidenella spiralis gen.et sp.nov.,Longifuniculum dissutum Steiner,Erdtmann and Chen,1992, Longitaenina triphyllus gen. et sp. nov., L. rhodina gen. et sp. nov., L. laceolatus gen. et sp. nov.;直立不分枝的管状宏观藻Longfengshania elongata Duan et Du,1985, L. elliptic-ulum sp. nov, Paralongfengshania oblong sp. nov. Miaohenella hunanensis（Steiner, Erdtmann and Chen,1992）, M. rhomba Ding,1996, M. taenina sp. nov., Cystoculum catenuatus gen. et sp. nov.;末端存在二歧式分叉的丝状宏观藻:Sectoralga bibarbatus sp. nov., S. typica Hu,1996,S. capillaceus sp. nov., S. umbellulata Hu,1996和水母状化石Taoyuania ovatoides gen. et sp. nov., Liaonanella giganta sp. nov., Wulingshania canopse gen. et sp. nov.及蠕虫状化石 Wenshanwania simplex gen. et sp. nov.等。从地层对比上看,上述化石可能与伊迪卡拉动物群为同一时期的产物。晚震旦世晚期留茶坡组中类水母化石的出现是我国晚震旦世生物演化史上一次重要事件,以类水母等软躯体动物和高分异度的宏观藻类?
A number of carbonaceous megafossils have been found from the black shale in the middle part of the late Sinian Liuchapo Formation in west Hunan. Preliminary study shows that these fossils are mainly composed of long ribbon-like or tap-like megaalga, vertical and unbranched siphonous megaalga, filements megaalga with bifurcating in the end, medusoid fossils as well as worm-like fossils, including Chenlidenella spiralis gen. et sp. nov., Longifuniculum dissutum Steiner,Erdtmann and Chen, 1992; Longfengshanian elongata Duan et Du, 1985, L.ellipticu-lum sp. nov., Paralongfengshanian oblong sp. nov., Miaohenella hunanensis (Steiner, Erdt-mann and Chen, 1992), M. rhomba Ding, 1996, M. taenina sp. nov., Cystoculum catenuatus gen. et sp. nov. ;Sectoralga bibarbatus sp. nov., S. typica Hu, 1996, S. capillaceus sp. nov., S. umbellulata Hu, 1996; Taoyuania ovatoides gen. et sp. nov., Liaonanella giganta sp. nov., Wulingshanian canopse gen. et. sp. nov. ; Wenshanwania simplex gen. et sp. nov, and so on. According to stratigraphic correlation, the biota mentioned above are probably as the same geological age of the Ediacara and are characterized by co-development of softy-body medusoid animals and megaalga, being different from biota in the strata of the same age and showing a new E-diacara Garden-the Wulingshan biota as suggested in this paper. Discovery of the medusoids from the late Sinian Liuchapo Formation marks an important evolutionary event of organism and will play an important role for correlation of Sinian strata in the world.
出处
《华南地质与矿产》
CAS
1999年第2期15-30,共16页
Geology and Mineral Resources of South China
基金
国家自然科学基金项目"震旦系年代地层划分的标志和时限"(49872016)中国地质科学院地质科技项目
