地质通报2016，Vol.35Issue(8)：1230-1233,4.
内蒙古发现白垩纪大型拟苏铁科（本内苏铁目）茎干化石
The first discovery of a Cretaceous big Cycadeoidaceae (Bennettitales) trunk from Inner Mongolia
摘要
Abstract
A well preserved big Cycadeoidea (Cycadeoidaceae, Bennettitales) fossil trunk has recently been found from the Cretaceous strata in Darhan Muminggan Joint Banner, Baotou City, Inner Mongolia. The trunk in columnar shape measures 56cm in height and 48cm in maximum diameter. It consists of central pith, peripheral xylem cylinder, petiole bases and cones from the central part to the outside. The dense rhombic bases of the petiole are helically arranged on the surface of the trunk. The petiole bases decrease in size from the base to the apex of the trunk, with cones unevenly scattered in between. This specimen is the first complete fossil trunk of Cycadeoidea found in China. The fossil wood of Xenoxylon latiporosum (Cramer) Gothan (Gymnosperm) is recognized near the fossil trunk. The trunk and other fossil woods are important materials for studying the evolution of Cycadeoidea and the composition of Cretaceous flora in northern China.关键词
拟苏铁属/异木属/本内苏铁目/茎干/内蒙古/白垩纪Key words
Cycadeoidea/Xenoxylon/Bennettitales/trunk/Inner Mongolia/Cretaceous分类
天文与地球科学引用本文复制引用
程业明,王曦,杨小男,谭锴,靳悦高..内蒙古发现白垩纪大型拟苏铁科（本内苏铁目）茎干化石[J].地质通报,2016,35(8):1230-1233,4.基金项目
财政部项目(编号121113000000160034)和国家自然科学基金项目 （编号121113000000160034）
