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Fourteen graptolite species of the Late Tremadoc and Early Floian are described from the Nanba section in the Yiyang area,Hunan Province.Among them,Paradelograptus onubensis, Kiaerograptus bulmani,K.kutchini and Paratemnograptus isolatus of the Late Tremadoc are first found in China.Based on the current graptolite materials,the correspondingly complete graptolite zones of Upper Tremadocian in China are recognized as follows(in ascending order):the Adelograptus tenellus Zone,the Aorograptus victoriae Zone,the Araneograptus murrayi Zone and the Hunnegraptus copiosus Zone.In the Nanba section,the Hunnegraptus copiosus Zone is overlain directly by the Tetragraptus approximatus Zone,there is no hiatus below the base of Floian.
Fourteen graptolite species of the Late Tremast and Early Floian are from the Nanba section in the Yiyang area, Hunan Province. Amm them, Paradelograptus onubensis, Kiaerograptus bulmani, K. kutchini and Paratemnograptus isolatus of the Late Tremast are first found in China. on the current graptolite materials, the correspondingly complete graptolite zones of Upper Tremadocian in China are recognized as follows (in ascending order): the Adelograptus tenellus Zone, the Aorograptus victoriae Zone, the Araneograptus murrayi Zone and the Hunnegraptus copiosus Zone. in the Nanba section , the Hunnegraptus copiosus Zone is overlain directly by the Tetragraptus approximatus Zone, there is no hiatus below the base of Floian.