A New Species of Coniopteris moguqiensis sp. nov. from the Middle Jurassic Wanbao Formation in Eastern Inner Mongolia, China

作     者：ZHANG Yujin LIU Bingcai LIANG Fei 

作者机构：Shenyang Center of Geological SurveyChina Geological SurveyShenyang 110034China College of PaleontologyShenyang Normal UniversityShenyang 110034China Key Lab of Evolution of Past Life in NE AsiaMinistry of Natural ResourcesShenyang 110034China State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and PalaeontologyCAS)Nanjing 210008China 

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

年 卷 期：2019年第93卷第5期

页      面：1317-1324页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：financially supported by the Project of the NSFC, China (grant No.41602015, 41702032) the Geological Survey Programs of the China Geological Survey (grant No. DD20160048-4, No. DD20190039-06, 2017YFC060130501) the State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) (grant No.183117) the Project “Establishment of Stratotypes of China—Improvements on Stratigraphic Chart of China” (grant No.2015FY310100) the Project “Divisions and Correlation of National Non-Marine Strata (K-Pg boundary) in China (grant No. 121201102000150010-04) 

主　　题：Coniopteris Wanbao Formation in situ spores Middle Jurassic Inner Mongolia 

摘      要：In recent years, an increasing number of plant fossil leaves and petrified woods have been discovered from the Middle Jurassic Wanbao Formation in Moguqi Town of Inner Mongolia, NE China. Here, we describe a new species of Coniopteris moguqiensis sp. nov. preserved as a fragment with fertile and sterile pinnules. The sterile ultimate pinnules are elongate ovate with sphenopteriod type venation, and fertile pinnules are usually isolated, bipinnate at least with the sorus apical, elliptical, 1 mm in diameter;sporangia are almost globular, 100-150 μm in diameter, and the annulus is vertical. In situ spores are rounded-triangular in polar view, 25-30 μm in diameter with sides straight and slightly convex;trilete, laesurae are thin and slightly straight;the exine surface is usually psilate under the light microscope but finely reticuloid sculptured on the proximal view under a scanning electronic microscope. The fern genus Coniopteris usually suggests a warm and humid environment, which is consistent with the palaeoclimatic conditions of petrified wood and megafossil plants. The new discovery further supplements the floral composition of the Wanbao Formation, providing new material for understanding the evolutionary trend and classification of Coniopteris.