A New Species of the Extinct Genus Schizolepis from the Jurassic Daohugou Flora,Inner Mongolia,China with Special Reference to the Fossil Diversity and Evolutionary Implications

作     者：ZHANG Jianwei Ashalata D＇ROZARIO YAO Jianxin WU Zhenjie WANG Lijun 

作者机构：Institute of Geology Chinese Academy of Geological Science Beijing 100037 China Department of Botany Narasinha Dutt College 129 Bellilious Road Howrah 711 101 India College of Ethnology and Sociology South Central University for Nationalities Wuhan 430074 Hubei China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2011年第85卷第2期

页      面：471-481页

核心收录：

学科分类：0710[理学-生物学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 071002[理学-动物学] 

基　　金：supported by the China Geological Survey (No. 1212010911047 and 1212010811057) the support from the Ministry Science Technology of the People's Republic of China (Grant 2006FY120300-12) 

主　　题：Daohugou Jurassic Pinaceae Schizolepis China 

摘      要：Schizolepis daohugouensis sp. nov. is described from the Jurassic sediments of Daohugou flora, from Ningcheng County, Inner Mongolia Autonomous Region, China. The female cone is slender, cylindrical in shape, seed scale complexes are loosely and helically arranged on the cone axis at intervals of 3-5 mm. The seed scales are bilobed and divided almost from the base; the scales have no evident petiole but an articulation at the region of attachment to the cone axis. Each lobe of the seed scales is oval in shape, widest at the lower middle part; lobes are obtusely pointed with entire margins. Bract scale is fan shaped. Based on the records of Schizolepis, this is the first report of the occurrence of female cone of Schizolepis with the seed scales, the winged seeds and vegetative branches preserved together in the Jurassic deposits. The new discovery provides evidence that confirms the phylogenetic position of Schizolepis to the extant Pinaceae.