中国科学院南京地质古生物研究所机构知识库

Based on a study of latest Tremadocian graptolites from Gulin of southern Sichuan and a re-examination of Tremadocian graptolite specimens previously collected from many other localities in South China, a new scheme of Tremadocian graptolite biozonation is proposed for the South China palaeoplate, to include seven zones. The discovery of Hunnegraptus novus and H. sp. from the top part of the Tungtzu Formation in Gulin indicates an age of latest Tremadocian (Hunnegraptus copiosus Zone). The Tremadocian graptolite succession of North China is also discussed and the Aorograptus victoriae Zone is suggested as a replacement of the former, misinterpreted, Adelograptus-Clonograptus Zone. A correlation of the revised graptolite biozonation of South China and North China with those of other continents is proposed.