Discovery of bipinnatifid fronds of Protoblechnum contractum(Gu et Zhi)  

作　　者：SUN Bainian and SHEN Guanglong Department of Geology, Lanzhou University, Lanzhou 730000, China  Department of Geology, Northwest University, Xi’an 710069, China 

出　　处：《Chinese Science Bulletin》1999年第4期381-383,共3页

摘　　要：IN Permian floras of China, a dispute over the relationship among the Protoblechnum and other similar plants such as Compsopteris, Glenopteris and Supaia has been existing for a long time, and moreover it has not been completely solved up to now. Halle placed a few simple pinnate fronds from the Shihhotze Formation in the genus Protoblechnum and named them Protoblechnum Wongii Halle 70 years ago when he was studying the fossil plants from the Late Palaeozoic strata in Shanxi, China. He did not think forked or unforked fronds as an important dividing genus condition in discussing the distinction among Protoblechnum and other relative fossils. Zalessky alSO found some specimens similar to Chinese Protoblechnum while he studied the Permian fossil plants from Russia. However, he did not approve of

关 键 词：very OVER Discovery of bipinnatifid fronds of Protoblechnum contractum Gu et Zhi 

分 类 号：Q914[天文地球—古生物学与地层学]