重新描述了湖南中泥盆世的锥石Changshaconus carinata Zhu,1985.通过比较,笔者认为Changshaconus与产自南非泥盆系和南、北美洲下......

对陕西宁强宽川铺地区灯影组宽川铺段原始锥石类carinachitids两个新种Emeiconularia amplicanalis sp.nov.和Carinachites platus......