澄江生物群分子在贵州遵义牛蹄塘组发现

澄江生物群是认识寒武纪生命大爆发的重要窗口，它的分布范围一直仅限于滇东地区，员近在贵州遵义松林牛蹄塘组底部页岩中发现有Naronia,Archotuba Conoidalis,Isaxys,Perpicaris,Lingulepis,Tsunyidiscus,Scenella,水母状化石(medusiform fossil)，海绵动物化石Leptomitus,类似半索动物秆壁虫Rhabdopleura化石，软舌螺类Hyolithids，宏观藻类和疑源类化石Zunyiphyton perelegans Yang et Zhao,1999,Yuknessia sp.,Longenema Ding,1996,Sphaerocongregus variabilis等。其中有一部分是属于澄江生物群分子，这是云南省外澄江生物群分子的新发现。由于生物群之下40m处还产大量海绵动物、高肌虫和藻类化石等组成的松林生物群，其上又有下寒武统明心寺组古杯动物群，因此，这一生物群的发现对研究早寒武世生物的演化也具有一定的科学意义，同时，对澄江生物群的古生态学研究也具有重要意义。

Members of the Chengjiang Biota from the Lower Cambrian Niutitang Formation, Zunyi County, Guizhou Province, China

The Chengjiang Biota was called a window of the "Cambrian explosion". The occurrences of the biota are all along restricted in eastern Yunnan Province. Recently, Naronia, Archotuba conoidalis, Isoxys, Persptcaris, Lingulepis, Tsunyidiscus, Scenella, medusiform fossil, Leptomitus, Rhabdopleura fossil, Hyolithids, Zunyiphyton perelegans Yang et Zhao, 1999, Yuknessia sp. , Longenema Ding, 1996, Sphaerocangregus variabilis were discovered in the Lower Cambrian Niutitang Formation of Zunyi County, Guizhou Province, China. Among them, Naronia, Archotuba conoidalis, Isoxys, Yuknessia sp. , medusiform fossil and Leptomitus are members of the Chengjiang Biota. The Biota from the upper part of the Niutitang Formation is called the " Zunyi Biota". It is the first time for Chengjiang-type Biota to be found outside Yunnan Province. Additionally, the "Songlin Biota" from the base of the Niutitang Formation, containing abundant sponge fossils, Arthropoda and algal fossils, has been found at 40 m beneath the occurring horizon of the "Zunyi Biota". Over the "Zunyi Biota", Early Cambrian Archaeocyathan fauna occur in the Mingxinsi Formation. Therefore, the discovery of the biota is of great importance to the study of evolution of Early Cambrian biota in Guizhou Province. Simultaneously, it is also important for the palaeoecological study of the Chengjiang Biota.