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Fothergilla malloryi : ウィキペディア英語版 | Fothergilla malloryi
''Fothergilla malloryi'' is an extinct species of flowering plant in the family Hamamelidaceae known from fossil leaves found in the early Eocene Klondike Mountain Formation deposits of Northern Washington State. The ''F. malloryi'' leaves are the earliest appearance in the fossil record of a member of the witchalder genus ''Fothergilla'', which includes the living species ''F. gardenii'', and ''F. major'', both of which are native to the southeastern United States.〔 The genus also includes three or four other fossil species with two Asian Miocene species, ''F. viburnifolia'' from China, ''F. ryozenensis'' from Japan along with one Miocene North American species, ''F. praeolata'' of Oregon. ''Fothergilla durhamensis'' described from Eocene sediments in King County, Washington is considered dubious in placement.〔 ==History and classification== ''Fothergilla malloryi'' is represented by a single counterpart compression fossil specimen from the Ypresian〔 aged Klondike Mountain Formation which outcrops in Republic, Ferry County, Washington. The age of the formation is based on Argon–argon dating, which has returned a date of 49.4 ±0.5 million years old.〔 The fossil was recovered from "Boot Hill", University of Washington site UWBM B4131 located within the city limits of Republic. The holotype specimen for ''Fothergilla malloryi'' is numbered UWBM 56625 and currently preserved in the paleobotanical collections of University of Washington in Seattle, Washington.〔 The specimen was studied by paleobotanists Meghan G. Radtke and Kathleen B. Pigg of the School of Life Sciences, Arizona State University and Wesley C. Wehr of the Burke Museum of Natural History and Culture in Seattle. Radtke, Pigg and Wehr published their 2005 type description for ''F. malloryi'' in the ''International Journal of Plant Sciences''. The etymology of the specific name ''malloryi'' was derived from V. Standish Mallory, University of Washington professor of geology and paleontology,〔(V.-Standish-Mallory Encyclopedia Britannica> )〕 in honor of his contributions to the Tertiary paleontology of Washington State.〔
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