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Williamsonia (plant) : ウィキペディア英語版 | Williamsonia (plant)
''Williamsonia'' is an extinct genus of plant belonging to Bennettitales, an order of seed plants which bore a resemblance to cycads. Fossilized specimens of ''Williamsonia'' have been discovered worldwide.〔 ==Taxonomy== ''Williamsonia'' was originally described as ''Zamia gigas'' by William Crawford Williamson. William Carruthers proposed the name ''Williamsonia'' in an 1870 paper of his, with the type species being ''W. gigas''.〔
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「Williamsonia (plant)」の詳細全文を読む
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