Cretaceous flowers of Nymphaeaceae and implications for complex insect entrapment pollination mechanisms in early angiosperms
Cretaceous flowers of Nymphaeaceae and implications for complex insect entrapment pollination mechanisms in early angiosperms
复制标题
DOI：
10.1073/pnas.0402473101
复制
发表时间：
2004-05-25
影响因子：
11.1
通讯作者：
Crepet, WL
中科院分区：
文献类型：
--
作者：
Gandolfo, MA;Nixon, KC;Crepet, WL
基于最近的分子系统学研究，睡莲谱系（睡莲目）提供了一个重要的关键，以了解祖先被子植物的形态和被子植物起源的背景下是相当大的兴趣。因此，睡莲目的化石记录可能提供证据的时间和性质的多样化的最早的分支之一的开花植物。图伦时代（约9000万年前）的最新化石证据包括化石花的字符，经过严格的分析，坚定地把它们在睡莲科。这些化石无疑是睡莲目最古老的花卉记录，与现代睡莲属维多利亚（巨大的亚马逊睡莲）和欧亚莲属密切相关。虽然这些化石比它们的现代亲戚小得多，但化石花的形态与现代维多利亚花的形态之间精确而戏剧性的对应关系表明，甲虫诱捕授粉存在于晚白垩世的最早期。
Based on recent molecular systematics studies, the water lily lineage (Nymphaeales) provides an important key to understanding ancestral angiosperm morphology and is of considerable interest in the context of angiosperm origins. Therefore, the fossil record of Nymphaeales potentially provides evidence on both the timing and nature of diversification of one of the earliest clades of flowering plants. Recent fossil evidence of Turonian age (approximate to90 million years B.P.) includes fossil flowers with characters that, upon rigorous analysis, firmly place them within Nymphaeaceae. Unequivocally the oldest floral record of the Nymphaeales, these fossils are closely related to the modern Nymphaealean genera Victoria (the giant Amazon water lily) and Euryale. Although the fossils are much smaller than their modern relatives, the precise and dramatic correspondence between the fossil floral morphology and that of modern Victoria flowers suggests that beetle entrapment pollination was present in the earliest part of the Late Cretaceous.