中文摘要：

中国奥陶纪晚期的孢型植物组合以隐孢子为主,不含真正三缝孢,称为Tetrahedraletes medinensis-Dy-adospora murusattenuata-Laevolancis chibrikovae（MMC）组合;中国志留纪早期孢型植物组合以隐孢子为主,包括四分体和单分体,缺失二分体,出现真正三缝孢,并产生不同的类型（光面、具纹饰、具弓形脊等类型）,被称为Tet-rahedraletes medinensis-Laevolancis chibrikovae-Ambitisporites avitus/dilutus（MCA）组合。孢型植物化石的某些相似性表明：华南和塔里木板块可能分布于相近的低古纬度,气候特征具有一定的可比性,代表近赤道的热带气候;至少在志留纪早期,华南和印支板块与冈瓦纳大陆距离较近,可能处于同一古气候带,代表相似的生物古地理特征。

英文摘要：

The sporomorph assemblage of Late Ordovician in China consists entirely of cryptospores（i.e.trilete spores are absent） which include fused permanent tetrads,unfused permanent tetrads,true dyads,pseudodyads,and hilate.This assemblage is named as Tetrahedraletes medinensis-Dyadospora murusattenuata-Laevolancis chibrikovae （MMC） assemblage.The sporomorph assemblage of Early Silurian in China includes trilete spores but is dominated by the cryptospores.The cryptospores are characterized by tetrads,hilate,and the lack dyads.The trilete spores consist of laevigate,apiculate,retusoid,and equatorially crassitate forms.The assemblage is named as Tetrahedraletes medinensis-Laevolancis chibrikovae-Ambitisporites avitus/dilutus （MCA） assemblage.The cryptospores and trilete spores are of the continental origin;the large oceans are impassable geographic barriers for these sporomorphs to disseminate.The sporomorphs from South China,Tarim,and Indo-China Palaeoplates show some similarities,which might indicate that：1） South China and Tarim palaeoplates were possibly located within the same palaeoclimatological zone that belonged to the tropical zone near palaeoequator;2） South China and Indo-China palaeoplates may have been in close proximity （maybe with some continental bridges in-between ） to each other at least in Llandovery.During that time they were also closely related with Gondwanaland that were located near the tropical and subtropical zone,and had similar palaeogeographical features.