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Fruits of Scirpus(Cyperaceae) from the early Miocene of weichang,Hebei Province,North China and their palaeoecological and palaeobiogeographical implications

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Journal of Palaeogeography 2019年第2期8卷 142-149页

作者： Ping Lu Ya Li Jian-Wei Zhang Xiao-Qing Liang Yue-Zhuo Li Cheng-Sen Li School of Chemistry BiologyEnvironmentYuxi Normal University CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of Sciences Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Qian-Dao-Hu Museum of Natural History State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences

This paper describes the fossil fruits of Scirpus weichangensis ***,*** the early Miocene of Guangyongfa Village,weichang County,Hebei Province,North *** fossil fruits are obovate in shape and their lateral sections are plumply *** cell walls of the surface are *** persistent stout bristles have downward-directed barbellae in distal 1/*** occurrence of the fossil Scirpus indicates that Guangfayong was a wetland in the early *** on the fossil data,the genus likely originated in Western Siberia in the Oligocene,spread during the Miocene,and was finally distributed worldwide in the Holocene.

关键词： Scirpus Early Miocene Palaeoecology Palaeobiogeography weichang

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Spirematospermum wetzleri (Heer) Chandler (Zingiberaceae) from the Miocene of weichang, Hebei Province, North China and the phytogeographic history of the genus

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Journal of Palaeogeography 2018年第4期7卷 308-315页

作者： Ya Li Tie-Mei Yi Yue-Zhuo Li Cheng-Sen Li State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China cas key laboratory of economic stratigraphy and palaeogeography nanjing institute of geology and palaeontology chinese academy of sciences nanjing 210008jiangsu provincechina beijing institute of science and technology information beijing academy of science and technology beijing 100044china qian-dao-hu museum of natural history hangzhou 311700zhejiang provincechina

Spirematospermum is a well-known extinct zingiberalean taxon, characterized by trilocular capsules containing many distinctive, spirally striate and arillate seeds. It is frequently found and studied in European Neogene carpological floras, but is scarcely represented in East Asia floras. In this work we recognize a new fossil record of Spirematospermum wetzleri（Heer） Chandler based on the capsules and seeds from the Miocene of weichang, Hebei Province, North China. These fossils represent the first record of the species in the Miocene of China. Fossil data indicate that Spirematospermum probably originated in the Late Cretaceous of North America or Central *** genus still existed in the Paleocene of North America, but became extinct after that time. However, the genus successively survived in Europe from the Eocene to Pliocene, and flourished luxuriantly during the Oligocene to Miocene. As there was Turgai Strait between Europe and Asia during the Eocene, the genus did not spread to Central Asia and West Siberia until the strait closed in the late Eocene/early Oligocene, and further expanded eastwardly to eastern Siberia, Russia, northern China and central Japan during the Miocene, but became extinct in Asia after the Miocene. The genus contracted its distribution to Europe in the Pliocene, and afterwards it became extinct in the world.

关键词： Spiremotospermum Zingiberaceae Musaceae Phytogeographic history Neogene Miocene weichang North China

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