New Materials And Paleoclimate Of The Subgenus Phoenicopsis (Phoenicopsis) In The Xilinhot Area Of ??Inner Mongolia

Xilinhot district is located in the southeastern margin of Inner Mongolia lateau,between the South of Greater Ordovician Khingan Range section and Inner Mongolia Plateau border zone,the administrative divisions belong to the Xilinhot city and Chifeng city in Inner Mongolia Autonomous Region Districtof.The main strata in the survey area are exposed in the Paleoproterozoic,Ordovician,Silurian,Permian,Jurassic,Cretaceous,Neogene,Quaternary,Silurian,and Jurassic,Permian to Quaternary are exposed more.Hongqi group mainly distributed in the dew point of coal mine in Xilinhot Basin,Daituojika mountain area,The coal mine section and drilling section exposed best in sur-vey area of Xilinhot city.Hongqi group is a set of continental river-lake Sediments,w-hiched is composed of conglomerate,pebbly sandstone,sandstone,siltstone,mudstone,san-dy mudstone and coal.It Products plant fossils and sporopollen fossils.Flora is mainly composed of filicophytina,ginkgo and equisetales etc,content wit hf ilicophytina take the lead,branches of Cladophlebis accounted for 28%of total fi-licophytina,with branches of Cladophlebis plant fossils of high total ratio of flora in the late early Jurass-ic in northern China has become a fairly typical.Classes in acqu-isition of the plant fossil is ginkgo flourish,such as ginkgoites,sphenobaiera,etc.Eq-uisetales is own large part of water plants,such as Neocalamites.The study included 47 species in 28 genera of pollen,the combination is mainly for the gymnosperm pollen th-at content was 6-4%;fern spore takes thesecond,accounting for 36%.Gymnosperm po-llen is mainly for Classopollis,accounting for 32%of the portfolio,and the species di-versity is higher.The are flects the lush vegetation and various types at that time,and its in the semi arid and semi humid subtropical climate zone.A species,Phoenicopsis(Phoenicopsis)chramovae Kiritch,with well-preserved cuticle from Xilinhot Basin of Inner Mongolia,China,was studied in gross morphology and anatomy.The leaves are hypostomatic,and papillae can be found on both upper and lower epidermis.The present research is beneficial to the taxonomic research of Phoenicopsis,and providing important evidence for studying the diversity of Czekanowskiales in geological time.Meanwhile,this discovery is also helpful for better understanding the paleogeography and paleoclimate in Early Jurassic Inner Mongolia.By sedimentological analysis,Xilinhot basin early Jurassic sedimentary period(Hongqi group)across the river Lakes and peat bog,formed a multi-level large-scale industrial coal,has a wide distribution range Represented the lush plants,warm temperate humid climate is beneficial to vegetation growth a warm temperate climate Ginkgo and Czekanowskia,combined with analysis of sedimentary characteristics of flora overall appearance reflects the warm temperate humid with seasonal changes in a warm temperate climate environment on behalf of a warm and humid climate with seasonal changes grown floraOn the research of Inner Mongolia through the Early Jurassic strata of flora and associated formation,it will provide new reference materials for studying Early Jurassic flora in Xilinhot and for restoring palaeo-geography and palaeo-climate.it also have a great value in the further coal resources.