Discovery of the Silurian chitinozoan fauna in the Mazha area, southern Yecheng, West Kunlun.
yao jianxin1; xiao xuchang1; gao lianda1; ji wenhua2; yin zongyi2; han fanglin2; ji zhansheng1; wu guichun11 institute of geology; chinese academy of geological sciences; beijing; 100037; china; 2 institute of geology and mineral resources; shaanxi bureau of geology and mineral exploration and development; xianyang 712000; shaanxi; china