首页|New material of Coniopteris simplex from the Middle Jurassic of the Ordos Basin,Inner Mongolia,China and implications on its spatio-temporal distribution and paleogeography

New material of Coniopteris simplex from the Middle Jurassic of the Ordos Basin,Inner Mongolia,China and implications on its spatio-temporal distribution and paleogeography

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Coniopteris simplex is a common component in many Jurassic floras.However,due to morpho-logical variations in sterile fronds and incomplete preservation of reproductive organs,its classification has been controversial for a long time.Here,we present new material collected from the Middle Jurassic Yan'an Formation in the Ordos Basin,Inner Mongolia.The new material reveals important morphological characters,including hemi-dimorphic fronds,two forms of sterile pinnae,short-stalked sori and sporangia on fertile fronds,annulus of sporangium composed of about 30 cells,in situ rounded triangular spores with protruded suture,and the lips of trilete laesura encircled by one or two rows of small ostioles.Based on these obser-vations,we emended the diagnosis of this common species.The spatio-temporal distribution of Coniopteris simplex shows that the iconic species was restricted to the paleolatitudes ranging from 19.5°N to 48.9°N in the Northern Hemisphere during the Early-Late Jurassic,mainly distributed in the tropical to paratropical zones,and the paleolongitude ranging from 9.6°E to 129.3°E,which may be limited by the opening of the Viking Corridor and the splitting of the Central Atlantic Ocean.

Coniopteris simplexYan'an FormationMiddle JurassicInner MongoliaPaleogeography

Yun-Feng Li、Chang-Lu Zhang、Fei Liang、Xiao Tan、Fan-Hao Gong、Chun-Lin Sun、Tao Li、Yu-Ling Na

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Research Center of Paleontology and Stratigraphy,Jilin University,Changchun 130026,Jilin Province,China

College of Earth Sciences,Jilin University,Changchun 130061,Jilin Province,China

College of Paleontology,Shenyang Normal University,Shenyang 110034,Liaoning Province,China

Key Lab of Evolution of Past Life in NE Asia,Ministry of Natural Resources,Shenyang Normal University,Shenyang 110034,Liaoning Province,China

Shenyang Center of Geological Survey,China Geological Survey,Shenyang 110034,Liaoning Province,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,CAS)Liaoning Provincial Natural Science Foundation

42172011421720174190200942293280318001821831172021-BS-158

2024

10.1016/j.jop.2024.03.001

古地理学报(英文版)

古地理学报(英文版)

影响因子：0.186
ISSN：
年,卷(期)：2024.13(2)
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