...In 1948-51, R. Florin proposed that the Cordaites were related to another large group of gymnosperms, the Cordaites, based on the study of many fossils from the Permian to Jurassic periods. On the other hand, with the discovery of the progymnosperms (also called protogymnosperms) by C.B. Beck (1960), it was proposed that both the Cycads and the Conifers were derived from the protogymnosperms, the Aneurophytonals and the Archaeopteris orders, respectively, and the phylogeny of gymnosperms is still debated today over whether it is monistic or dualistic. *Some of the terminology that mentions "Beck, CB" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…もう一つの裸子植物の大きな群,球果類については,1948‐51年にフローリンR.Florinが,コルダイテスとの類縁性を二畳紀からジュラ紀にかけての多くの化石の研究により提言した。いっぽう,ベックC.B.Beckによる前裸子類(原裸子(げんらし)植物ともいう)の発見(1960)により,ソテツ系,球果系ともにそれぞれ原裸子植物のアネウロフィトン目とアルカエオプテリス目から由来するという提唱もあり,裸子植物の系統については単元論,二元論をめぐり,現在でも論議が続いている。 ※「Beck,C.B.」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 |
<<: Beck, EV& AN (English spelling) BeckEVAN
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