The Sporomorphs from the Late Ordovician to Early Silurian in China and Their Palaeogeographical Implication 

• 责任者：Wang Yi (State Key Laboratory of Palaeobiology and Stratigraphy ; Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China)
• 刊名：Acta Palaeontologica Sinica
• 出版年：2010
• 卷期：49(1)
• 关键词：孢粉类型 ; palynomorphs ; 塔里木盆地 ; Tarim Basin ; 扬子地区 ; Yangtze Region ; 云南 ; Yunnan Province
• 页码：p.1-9
• 图表：1 illus., 52 refs.
• 分类号：1102
• issnNo：ISSN0001-6616
• isbnNo：CN32-1188/Q

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.