Global Geology 2015, 18(2) 75-87 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
Anomozamites
Bennettitales
Middle Jurassic
Haifanggou Formation
western Liaoning
Authors
ZHAO Miao 1
2
3
SUN Chunlin 1
2
David L. Dilcher 1
2
3
ZHAO Zhe 4 and NA Yuling 1
2
PubMed
Article by ZHAO Miao 1
Article by 2
Article by 3
Article by SUN Chunlin 1
Article by 2
Article by David L. Dilcher 1
Article by 2
Article by 3
Article by ZHAO Zhe 4 and NA Yuling 1
Article by 2

Anomozamites (Bennettitales) from Middle Jurassic Haifanggou Formation,western Liaoning,China

 ZHAO Miao, SUN Chunlin, David L. Dilcher, ZHAO Zhe and NA Yuling

1. Research Center of Paleontology and Stratigraphy,Jilin University,Changchun 130026,China; 2. Key Laboratory for Evolution of Past Life and Environment in Northeast Asia,Ministry of Education,Changchun 130026,China; 3. Department of Geology and Biology,Indiana University,Bloomington,IN 47405 USA; 4. The Second Geologic Survey of Jilin Province,Jilin 132013,China

Abstract

The Middle Jurassic Hangfanggou Formation is well exposed in Shangsanjiao and Xiasanjiao villages area,Baimashi town of Huludao,western Liaoning,China. Recently,abundant fossil plants were collected from the Hangfanggou Formation. One new species,Anomozamites sanjiaocunensis sp. nov. (Bennettitales),is described in this study. This is the first report of the genus Anomozamites from the Haifanggou Formation based upon the leaf morphology and epidermal structures. The discovery of the new species extends significantly the stratigraphic and geographic distribution of Anomozamites in the Middle Jurassic. It also shows that Ano- mozamites was a common member of Bennettitales once lived in the Middle Jurassic warm temperate region. The new species also improves the knowledge on understanding the leaf morphology,epidermal features and the di- versity of Anomozamites during the Middle Jurassic. The epidermal characters of the new species and its associ- ated plants reveal that the plants grew in a warm and moderately humid environment in the warm temperate zone. The presence of some deciduous plants,such as ginkgoaleans,czekanowskialeans and conifers,indicate the climate with seasonal fluctuations in temperature.

Keywords Anomozamites   Bennettitales   Middle Jurassic   Haifanggou Formation   western Liaoning  
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