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

甘肃永昌乌拉尔世2种 Sphenopteris 手标本素描 a— Sphenopteris yongchangensis sp. nov.,基于标本GSYC-LDGSW-2018-104(A,B)( 图3-e );b— Sphenopteris nystroemii ,基于标本GSYC-LDGSW-2018-236( 图5-g )