...Fossils of various horsetails, ferns (especially many from the family Equisetaceae), cycad leaves, ginkgo trees, and cones from the Late Triassic period have been beautifully preserved. In many cases, only parts of the plant are known, but among the Omine flora, there are many that are known in almost complete form, such as Asterotheca okafujii (Lucifera family) and Neocalamites (Equisetales), making them important paleontological materials. There are also many cones that are thought to have grown only in the Triassic period, which are useful for understanding the vegetation of Japan at that time. ... *Some of the terminology that mentions "Asterotheca okafujii" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…三畳紀後期の各種のトクサ,シダ(とくにヤブレガサウラボシ科のものが多い),ソテツ葉類,イチョウ,球果類などの化石がみごとに保存されている。植物の化石は,その植物体の一部分しか知られていない場合が多いが,大嶺植物群の中には,アステロセーカ・オカフジイAsterotheca okafujii(リュウビンタイ科)やネオカラミテスNeocalamites(トクサ目)など,植物の全体の体がほとんど完全な形で知られているものが多く,古生物学的に重要な資料となっている。また三畳紀に限って生育したと考えられる球果の類も多く,これらは当時の日本の植生を知るのに役立っている。… ※「Asterotheca okafujii」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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