中文摘要：

Mannik（1998）建立的牙形刺Pterospathodus eopennatus带在华南普遍存在,以前鉴定的P.celloni带的地层多数都要归入P.eopennatus带,包括秀山组的上段;P.celloni带的地层主要存在于宁强组神宣驿段的中上部,分布有限。扬子地台上秀山组的顶界在各剖面上不等时。秭归纱帽组顶部的灰岩层的时代是Telychian早期P.eopennatus带上部,可能延伸到P.a.angulatus带。溶溪组、马脚冲组的地层可能应归入Aeronian阶而不是Telychian阶。

英文摘要：

P.eopennatus Zone named by Mnnik （1998） is widely distributed in South China,the strata identified previously as P.celloni Zone should mostly be assigned to P.eopennatus Zone,including the Upper Member of the Xiushan Formation.The strata of P.celloni Zone is mainly present in the middle-upper parts of the Shenxuanyi Member of the Ningqiang Formation,with limited distribution.The upper limits of the Xiushan Formation on the Yangtze Platform are diachronous.The age of the limestone bed at the uppermost part of the Shamao Formation at Yanglin,Zigui County,Hubei,should be early Telychian,within the late P.eopennatus Zone,or possibly up to P.a.angulatus Zone.It seems advisable that Rongxi and Majiaochong formations be assigned to Aeronian rather than Telychian.