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Introduction
Silurian graptolite-bearing strata are well developed in Chengkou, south
of the Daba Mountain in Sichuan Province. The graptolite sequence is one
of the most complete in Central China. In 1944, Yang Jingzhi in his paper
" The Cambrian and Ordovician sections of Tapashan , NE Sichuan",
Only assigned these strata to the Silurian without making detailed study
of the Silurian graptolites.
In the autumn of 1965, Liu Yingkai and his colleagues of the 2nd Geological
Survey and Prospecting Team of Geological Bureau of Sichuan, Zhu Zhaoling,
Xu Hankui and Yuan Kexing of Nanjing Institute of Geology and Palaeontology,
Academia Sinica and the writer studied systematically the Silurian strata
and collected a large number of Silurian graptolites from Chengkou. In
addition, in 1965, Liu Yingkai and his colleagues collected many Silurian
graptolites from Taiyanghe of Enshi, Hubei. All the specimens are described
by the writer in this paper. 155 species and subspecies belonging to 27
genera are recognized. Of them one subfamily one genus, 14 species and
3 subspecies are new.
Contents
1. Dendroidea Nicholson, 1872
(1) Dendrograptidae Roemer in Frech, 1897
2. Graptoloidea Lapworth, 1875
(1) Diplograptidae Lapworth, 1873
(2) Retiolitidae Lapworth, 1873
(3) Monogratidae Lapworth, 1873
(4) Cyrtograptidae Averianow, 1929
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