国立科博専報,(44),2006年3月28日 Mem. Natn. Sci. Mus., Tokyo, (44), March 28, 2006 Miocene Floras of Taiwan: an Overview in Comparison with Those of Southwestern End of Japan Kazuhiko Uemura1 and Ching-Yao Li2 1 Department of Geology and Paleontology, National Science Museum, Tokyo, 3–23–1 Hyakunin-cho, Shinjuku-ku, Tokyo, 169–0073 Japan E-mail:
[email protected] 2 Tung Fang Institute of Technology, Hu-Nei Shang, Kaohsiung Co., Taiwan Abstract. Miocene megafossil floras in Taiwan are reviewed, and floral characteristics for the Shihti flora (Early Miocene) in the northern part of Taiwan and Lilongshan flora (Late Miocene) in the southern part are briefly discussed. In particular, the comparison is made with the Early to Middle Miocene floras from the Yaeyama Group in Yonaguni-jima and Iriomote-jima, southwest- ern end of Japan. The Shihti and Lilongshan floras, together with the flora from Yonaguni-jima, show the feature of oak-laurel forest in the warm-temperate to subtropical regions. The flora from Iriomote-jima is characterized by wetland and more temperate elements. These floras in Taiwan and Yonaguni-jima and Iriomote-jima in Japan provide evidence of Miocene floras in the low- latitudes where little is known up to the present. Key words : Miocene, megafossil flora, Taiwan, Yonaguni-jima, Iriomote-jima. crofossils (Huang & Huang, 1984; and others). Introduction Furthermore, since Miocene floras of Taiwan In Taiwan, Tertiary sediments are widely dis- represent one of the low-latitude floras, these tributed throughout the island. Miocene sedi- provide evidence of the latitudinal gradient of the ments crop out in the western mountainous and Miocene floras in the eastern maritime areas of hilly lands along the Central Mountain Ranges the Eurasian Continent.