论文部分内容阅读
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。
The late Ordovician spore-forming plant assemblages in China were dominated by cryptosporidium and did not contain any true trichosporium, which was named as Tetrahedra del mediterranensis-Dy-adospora murusattenuata-Laevolancis chibrikovae (MMC). In early stage of Silurian in China, Cryptosporidium-dominated, including tetrad and monodifferentiation, lack of dichotomies, the emergence of true three-stalk spores, and produce different types (smooth, with ornamentation, arched ridges and other types), known as Tet-rahedraletes medinensis-Laevolancis chibrikovae-Ambitisporites avitus / dilutus (MCA) combination. Some similarities between the sporophytic fossils show that the South China and Tarim plates may be located at similar low latitudes and the climatic characteristics are comparable to each other and represent the near-equatorial tropical climate. At least in the early Silurian, South China and Indo-China Plate and Gondwanaland are close, probably in the same paleoclimatic zone, representing similar biological paleogeographical features.