前言:黔南三都地区锅塘组(O_1~1)是一套灰色条带状灰岩夹页岩的地层,富含Nileus(?)sp.,Symphysurus(?)wimani(Troedsson),S.sp.,Geragnostus sp,Niobella sp.,Apatokephalus(?)sp.,Euloma sp.,Macropyge sp.,Phalacroma sp.,Hysterolenus sp.,Asaphidae,Olenidae,Dictyonemasp.,Callograptus sp.,等。其中并没发现 Acroce-phalina。