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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Acer republicense ： ウィキペディア英語版 Acer republicense ''Acer republicense'' is an extinct maple species in the family Sapindaceae described from a single fossil samara. The species is solely known from the Early Eocene sediments exposed in northeast Washington State, USA. It is the only species belonging to the extinct section ''Republica''. ==Taxonomy== ''Acer republicense'' is known from a single specimen which was recovered from an outcrop of the early Eocene, Ypresian〔 Klondike Mountain Formation in Republic. The section ''Stewarta'' contains only the species ''A. republicense''.〔〔 The Klondike Mountain Formation preserves an upland temperate flora which was first interpreted as being microthermal,〔 however further study has shown the flora to be more mesothermal in nature. The plant community preserved in the Klondike Mountain formation is a mixed conifer–broadleaf forest with large pollen elements of birch and golden larch, but also having notable traces of fir, spruce, cypress, and palm. ''A. republicense'' is one of a number of ''Acer'' species described from the Republic site by Wolfe and Tanai.〔 Like the associated species such as ''A. hillsi'', ''A. stonebergae'' and ''A. toradense'', ''Acer republicense'' is only known from the samara fossils. This contrasts the species ''A. washingtonense'' which is known from fossil samaras and leaves.〔 The species was described from a solitary part and counterpart type specimen, the holotype samara, number UAPC S5414A, B, which is currently preserved in the paleobotanical collections of the University of Alberta in Edmonton, Alberta.〔 The specimen was studied by paleobotanists Jack A. Wolfe of the United States Geological Survey, Denver office and Toshimasa Tanai of Hokkaido University. Wolfe and Tanai published their 1987 type description for ''A. republicense'' in the ''Journal of the Faculty of Science, Hokkaido University''.〔 The etymology of the chosen specific name ''republicense'' is in recognition of the type locality in Republic, Washington, and as the only species in the section ''Republica'', the section name is a derivation of ''republicense''.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Acer republicense」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.