Ginkgo Huolinhensis sp.nov.from the Lower Cretaceous of Huolinhe Coal Field,Inner Mongolia,China  

作　　者：DONG Man SUN Ge 

机构地区：[1]Research Center of Palaeontology and Stratigraphy,Jilin University,Changchun 130026,China [2]Key Lab for Evolution of Past Life and Environment in NEAsia,Ministry of Education,China(Jilin University),Changchun 130026,China [3]Palaeontological Institute,Shenyang Normal University,Shenyang 110034,China

出　　处：《Acta Geologica Sinica(English Edition)》2012年第1期11-19,共9页地质学报（英文版）

基　　金：the Project "111" of China for the financial support

摘　　要：A new species, Ginkgo huolinhensis sp. nov., with well-preserved cuticle from the Lower Cretaceous, Huolinhe Formation of Huolinhe Coal Field in Inner Mongolia, China, was studied morphologically and anatomically. The main characters of the new species are found in the leaves which are deeply dissected with narrow lobes, trichomes developed on both upper and lower epidermal cells, a media papilla developed on the periclinal walls for each cell in upper cuticle, and no trichomes on the cuticle of the petioles. These characters of G. huolinhensis sp. nov. distinguish from the known species of Ginkgo previously reported. This study of the new species is beneficial for the taxonomic research of fossil Ginkgo, and should be helpful for a better understanding the paleoenvironment of Ginkgo living in northeastern China during the Early Cretaceous.A new species, Ginkgo huolinhensis sp. nov., with well-preserved cuticle from the Lower Cretaceous, Huolinhe Formation of Huolinhe Coal Field in Inner Mongolia, China, was studied morphologically and anatomically. The main characters of the new species are found in the leaves which are deeply dissected with narrow lobes, trichomes developed on both upper and lower epidermal cells, a media papilla developed on the periclinal walls for each cell in upper cuticle, and no trichomes on the cuticle of the petioles. These characters of G. huolinhensis sp. nov. distinguish from the known species of Ginkgo previously reported. This study of the new species is beneficial for the taxonomic research of fossil Ginkgo, and should be helpful for a better understanding the paleoenvironment of Ginkgo living in northeastern China during the Early Cretaceous.

关 键 词：new species GINKGO Early Cretaceous Huolinhe Inner Mongolia 

分 类 号：P618.11[天文地球—矿床学] S792.95[天文地球—地质学]