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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 Nelumbo aureavallis ： ウィキペディア英語版 Nelumbo aureavallis ''Nelumbo aureavallis'' is an extinct species of flowering plant in the lotus family known from Ypresian age Eocene fossils found in western North Dakota, USA. The species was described from two leaf specimens with reference to four others. The leaves were found at the AMNH fossil localities 14088, 14089, 14091a, and 14099 all of which are in the Camels Butte member of the Golden Valley Formation. The Camels Butte member outcrops at a number of sites in western North Dakota, and is designated the type locality.〔 The holotype specimen, number ''USNM 43231'', and paratype, number "USNM 43229, are both preserved in the National Museum of Natural History collections of the Smithsonian Institution.〔 The pair of specimens were studied by paleobotanist Leo J. Hickey of the Yale University Geology Department. Dr Hickey published the 1977 type description for ''N. aureavallis'' in the Geological Society of America memoir 150, ''Stratigraphy and Paleobotany of the Golden Valley Formation (Early Tertiary) of Western North Dakota''.〔 In the type description the etymology for the specific name ''aureavallis'', "of Golden Valley" was not explicitly specified. Dr Hickey noted the extreme similarity between modern ''Nelumbo'' species leaves and those of ''N. aureavallis''.〔 The leaves of ''Nelumbo aureavallis'' are up to in diameter with a smooth, slightly wavy margin. The leaf stalk attached to the leaf in the center, from which between thirty-five and forty thick primary veins extend towards the margin. Each of the primary veins branches from one to three times. The secondary veins form a transverse pattern and this combined with the large number of primaries distinguish ''N. aureavallis'' from extinct Nymphaeaceae genera and warrant its inclusion into ''Nelumbo''. Preserved along with, but not attached to, the holoype leaf is a flower bud which is very similar to modern lotus flowers. While not attached the close proximity to the leaf and similarity allowed for the tentative inclusion of the bud in ''N.aureavallis''.〔 ==References== 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「Nelumbo aureavallis」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.