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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 Cornus piggae ： ウィキペディア英語版 Cornus piggae ''Cornus piggae'' is an extinct species of dogwood known from fossil fruits found in Late Paleocene sediments exposed in the state of North Dakota, USA. ''C. piggae'' is one of three extinct species placed in the ''Cornus'' subgenus ''Cornus'' based on fossil fruit morphology. The other two species, ''C. ettingshausenii'' and ''C. multilocularis'' are known from pyritized fruits found in sediments of the London Clay in England. ''C. piggae'' is the only North American fruit species yet described and is also the oldest described species in ''Cornus'' subgenus ''Cornus''. ==History and classification== ''Cornus piggae'' is represented by a group of fifteen specimens from the Tiffanian aged Sentinel Butte Formation which outcrops in near the town of Almont, North Dakota and the Beicegal Creek, North Dakota. The age of the formation is based on the recovery of late Tiffanian mammals in the upper section of the formation along with the floral and palynological assemblages of the formation. Thirteen of the fossils were recovered from the University of Florida location 15722 at Almont while the remaining two are from location 18907 near Beicegal Creek.〔 The holotype specimen for ''Cornus piggae'' along with eight of the paratypes are currently preserved in the paleobotanical collections of the Field Museum of Natural History in Chicago, Illinois. Five of the Almont paratype specimens and one Beicegal Creek specimen are in the university of Florida Collections, with the remaining Almont specimen housed at the University of Wisconsin–Stevens Point and the second Beicegal Creek specimen in the Arizona State University collections. The specimens were studied by paleobotanist Steven R. Manchester of the university of Florida, and botanists Xiao-Ping Xiang of the Chinese Academy of Sciences, and Qiu-Yun (Jenny) Xiang of North Carolina State University. Manchester, Xiang, and Xiang published their 2010 type description for ''C. piggae'' in the ''International Journal of Plant Sciences''. The etymology of the specific name ''piggae'' was derived from Professor Kathleen Pigg's name in honor of her contributions the field of paleobotany.〔 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「Cornus piggae」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.