831. TETRACENTRON LEAVES FROM THE NEOGENE OF JAPAN

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  • 831. 日本新第三系産 Tetracentron 葉化石
  • 日本新第3系産Tetracentron葉化石〔英文〕
  • ニホン シンダイ3ケイサン Tetracentron ハカセキ エイブン

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Description

Hovenia masuzawaensis from the late Miocene Masuzawa Formation of northeastern Honshu, Japan is re-examined and recognized to be entirely identical with Tetracentron ibei Suzuki from the late Miocene Kabutoiwa (upper Motojuku) Formation of central Honshu, Japan. These two species are re-classified as Tetracentron masuzawaense (Murai), n. comb. I discovered leaves that are referred to the genus Tetracentron from the late Pliocene Atagi Formation of central Honshu. Species belonging to the genus Tetracentron changed their habitat; subtropical forest till the Eocene, the lower zone of cool-temperate forest during the late Miocene, and cool-temperate forest in the late Pliocene. They are presently growing in the warm-temperate forest of China and the Himalayas.

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