作 者 ：Li Jia-Ying
期 刊 ：植物分类学报 1984年 3期
Keywords:Tetracyclus, ,
Abstract:
This paper reports a diatom assemblage found by the author from the Upper
Tertiary continental strata in Shangdu County in Niemongol Autonomous Region and Dun-
hua County in Jilin Province of China. The diatom assemblage in Shangdu County com-
prises 4 new species and 2 new varieties: Tetracyclus ellipticus var. ovalifolium Li; Tetra-
cyclus ellipticus var. rostrata Li; Tetracyclus jaoi Li; Tetracyclus navicularis Li; Tetracyclus
shangduensis Li and Tetracyclus sinensis Li. From the Miocene of Dunhua County; Jilin
Province are recorded 2 new species: Tetracyclus dunhuanensis Li and Tetracyclus ovaliformis Li.