贵州关岭生物群中发现完美的植物化石

关岭生物群是指贵州关岭一带以大量海生爬行动物和海百合为特色的多门类化石群［１］，现已成为中国重要的化石宝库之一，但以往一直没有植物化石的报道。近些年来，笔者等在该地产海生爬行动物的同一层位中首次发现较多的植物化石，经鉴定为CtenozamitessarraniZeiller和Equisetitesare－naceus（Jaeger）Bronn．。这些植物化石的发现不仅增添了关岭生物群的组成内容，而且为海生爬行动物时代的确定提供了新的证据。植物化石产于关岭县新铺乡小凹组（原称“瓦窑组”）近底部。小凹组主要系一套海相不纯碳酸盐岩沉积，由灰、深灰、灰黑色…

Discovery of intact fossil plants in the Guanling biota in Guizhou

In recent years,two species of fossil plants,i.e.Ctenozamites sarrani Zeiller and Equisetites arenaceus(Jaeger)Bronn,have been found for the first time in the Xiaowa Formation in Guanling County,Guizhou.They occur together with marine reptiles,crinoids,ammonites,bivalves,conodonts,fishes,brachiopods etc.The Xiaowa Formation is composed of a sequence of marine deposits,in which fossil plants may have been carried to the bay from the land not far from the coast by rivers and deposited there.This finding not only adds a new element to the Guanling biota,but also provides further evidence for determining this biota to be of Carnian age.