Some conifers from Aptian in Yanbian area of Jilin, Northeast China

作     者：ZHAO Guowei SUN Yuewu ZHANG Ying 

作者机构：Research Center of Paleontology and Stratigraphy Jilin University College of Earth Sciences Jilin University Key Laboratory for Evolution of Past Life and Environment in Northeast Asia Ministry of Education (Jilin University) International Center for Geoscience Research and Education in Northeast Asia Jilin University 

出 版 物：《Global Geology》 (世界地质（英文版）)

年 卷 期：2013年第16卷第2期

页      面：59-67页

学科分类：07[理学] 0713[理学-生态学] 

基　　金：supported by the Natural Science Foundation of China (No.30670138 31270277) 

主　　题：Elatides Pityostrobus cuticle Cretaceous Changcai Formation 

摘      要：Some well-preserved conifer leafy shoots and female cones from the Lower Cretaceous Changcai For- mation near Fudong of Helong, eastern Jilin, Northeast China are studied. Based on gross morphological and cuticular study, a new species, Elatides helongensis Sun et Zhao （ sp. nov. ） is described systematically. The new species is characterized by persistent, linear or slightly falcate leaves with obtusely acute apex, attached helically on the shoots. Female cones of the new species are terminal and oval, composed of persistent helically- arranged rhomboidal scales and erect seeds. One erect seed is growing on each scale. Leaf cuticles are hyposto- matic. Monocylic stomata are ellipse, composed of 2 sunken guard ceils and 4-8 subsidiary cells. Moreover, the cuticles of a young female cone of Pityostrobus yingchengensis Yang are described for the first time.