A neotype for Colpodexylon gracilentum Dou (Lycopsida) from the Middle Devonian of North Xinjiang,China  

作　　者：Hong-He XU Yi WANG 

机构地区：[1]State Key Laboratory of Palaeobiology and Stratigraphy, Nanfing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China

出　　处：《Journal of Systematics and Evolution》2011年第4期372-378,共7页植物分类学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grant No.40902005)

摘　　要：According to newly collected and well preserved specimens, herbaceous lycopsids Colpodexylon gracilentum Dou and Colpodexylon laminatum Dou from the late Middle Devonian of Xinjiang, NW China are reduced to C. gracilentum, for which a neotype is designated and emended diagnosis is given. Colpodexylon gracilentum has leaves with three nearly equal segments, an elliptical sporangium adaxially attached by a pad on the isomorphic sporophyll.According to newly collected and well preserved specimens, herbaceous lycopsids Colpodexylon gracilentum Dou and Colpodexylon laminatum Dou from the late Middle Devonian of Xinjiang, NW China are reduced to C. gracilentum, for which a neotype is designated and emended diagnosis is given. Colpodexylon gracilentum has leaves with three nearly equal segments, an elliptical sporangium adaxially attached by a pad on the isomorphic sporophyll.

关 键 词：Colpodexylon DEVONIAN LYCOPSID NEOTYPE Xinjiang. 

分 类 号：TU991.25[建筑科学—市政工程] Q914.6[天文地球—古生物学与地层学]