甘肃永昌乌拉尔世 Sphenopteris(楔羊齿)新记录: 兼论晚古生代 Sphenopteris多样性及古地理演化*

甘肃永昌乌拉尔世 Sphenopteris(楔羊齿)新记录: 兼论晚古生代 Sphenopteris多样性及古地理演化^*

王雪莲¹, 熊聪慧², 孙柏年²

New records of Sphenopteris from the Cisuralian of Yongchang,Gansu Province,with a discussion on diversity and palaeogeographic evolution of this genus during the Late Paleozoic

WANG Xuelian¹, XIONG Conghui², SUN Bainian²

甘肃永昌乌拉尔统地层柱状图及地理位置(据梁建德等,1980 ) a—化石采集点地理位置; b—地层柱状图及化石产出层位