![]() 2 Fossils are known from the Cenomanian onwards. glyptostroboides ) (1–3, 5–8) and modern M. Metasequoia redwood fossils are known from many areas in the Northern Hemisphere more than 20 fossil species have been named (some were even identified as the genus Sequoia ), but are considered as just three species, M. ![]() Most are not accurate, and some are even wrong. Vegetative and reproductive features as well as details of leaf cuticle are described. Leafy shoots, leaves and seed cones of fossil Metasequoia sp. The story of the discovery of the 'living fos- sil' Metasequoia glyptostroboides Hu & Cheng (dawn redwood, Chinese redwood, or water fir in English, shui shan in Chinese) has been told and retold, but not all accounts are identical. Specimens of Metasequoia from the Late Cretaceous or Early Tertiary collected from the Wuyun Formation, Jiayin County, Heilongjiang Province, north-east China, include shoots, female and male cones. Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan 666303, China SU Tao, principal investigator of the study. The intensification of the Asian monsoon in Yunnan during the Neogene most likely prevented necessary adaptations of the plants to increasing winter and spring aridity,” said Prof. “We regard that the disappearance of Metasequoia from Southwest China might be related to the evolutionary stasis of Metasequoi. Established the new fossil genus Metasequoia in the paper On the change of flora in eastern Asia since. It was present in the Arctic cool temperate zone during the Eocene, in temperate zones, e.g., in Northeast China during the Paleogene as well as in nearly subtropical areas in Southwest China during the Neogene. Promoted to Lecturer at Kyoto University. The researchers also found that the genus has remained morphologically static at least since the early Neogene. glyptostroboides, the researchers identified their fossil materials as Metasequoia sp. Judging by the great morphological similarity between the fossils and extant M. The Sanzhangtian fossils differ from other fossil-species of Metasequoia in seed cone phyllotaxis, which is exclusively decussate in the Sanzhangtian cones but mixed decussate–helical in the others. Metasequoia glyptostroboides, the dawn redwood, is a fast-growing, endangered deciduous conifer. The genus Sequoia first appears in the fossil record as. The fossil record has been published in Review of Palaeobotany and Palynology.Ĭharacters of leafy shoots, including the cuticle micromorphology of the leaves and gross-morphology of seed cones, unambiguously refer the fossils from Sanzhangtian to the genus Metasequoia. Todays Metasequoia has a full pyramidal shape, grows to 120 high. It’s the first Metasequoia fossil record in Southwest China and the southernmost fossil record of the genus around the world. Researchers from Xishuangbanna Tropical Botanical Garden (XTBG) have recently discovered numerous well-preserved leafy shoots and seed cones of Metasequoia from the middle Miocene deposits in Sanzhangtian, Zhenyuan County, Yunnan. Although native to China, reliable Metasequoia megafossil records from only nine localities ranging from the Late Cretaceous to the middle Miocene have been reported in this country to date, most of them were reported from the northern part of China.
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