Plant Diversity ›› 1993, Vol. 15 ›› Issue (01): 1-3.
• Articles •
ZHOU Zhe-Kun
Online:
Published:
周浙昆
Abstract: The original time and geological distribution of Quercus are disscussed based on fos-sil records. The fossil record of Quercus was thought to extend far back into the Cretaceous. Most Cretaceous fossils assigned to Quercus are however poorly preserved and none have been proven to be Quercus. The first believable record of Quercus is from the mid-dle Eocene Clarno Formation of Oregon, United States. This fossil showed that Quercus was already diverse in the Eocene.
Key words: Fagaceae
摘要: 本文根据现有化石资料,讨论了栎属起源的时间和地史分布。白垩纪以前的壳斗科大化石的记录是不可靠的。可靠的壳斗科大化石见于古新世。最早的、无疑问的栎属化石产于美国始新世,而且当时的栎属化石已经有了较大分化。被定为栎粉属的栎属花粉化石在地层中的比例,由古新世的偶有发现逐渐增大,到渐新世达38%以上。据此推测栎属起源的时间不早于白垩纪晚期,亦不晚于始新世,最可能的起源时间是古新世最早期。中国可靠的栎属大化石见于抚顺始新世。青冈亚属的现代地理分布和地史分布表明:该类群的现代分布格局在中新世就已经形成。高山栋类的化石分布格局在中新世就已经形成。高山栎类的化石记录始见于中新世、上新世以后,这类植物成了植被的优势成分。落叶栎类出现的时间明显晚于常绿栋类出现的时间。
关键词: 壳斗科, 栎属, 第三纪, 地史分布
ZHOU Zhe-Kun. THE FOSSIL HISTORY OF QUERCUS[J]. Plant Diversity, 1993, 15(01): 1-3.
周浙昆. 栎属的历史植物地理学研究[J]. Plant Diversity, 1993, 15(01): 1-3.
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URL: https://www.integrativebiology.ac.cn/pd/EN/
https://www.integrativebiology.ac.cn/pd/EN/Y1993/V15/I01/1