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Deciphering angiosperm origins

机译:解释被子植物的起源

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摘要

Data generated to provide answers to Darwin's 'abominable mystery', i.e. the sudden appearance, and subsequent exponential increase in diversity, of angiosperms in the fossil record are examined. It is observed that as yet we do not have sufficient data either to identify ancestral forms of angio-sperms or to fix the time of their origin. In the fossil record first indubitable angiosperms appear only in the Early Cretaceous. Pollen data, however, do suggest that angiospermoid morphology appeared by Late Triassic. The possibility of polyphyletic origin of angiosperms is not ruled out.
机译:检查了产生的数据以回答达尔文的``令人难以置信的谜团'',即化石记录中被子植物的突然出现以及随后多样性的指数增长。可以观察到,到目前为止,我们还没有足够的数据来确定血管精子的祖先形式或确定其起源时间。在化石记录中,第一个不可逾越的被子植物仅出现在白垩纪早期。花粉数据确实表明,晚三叠世出现了被子植物形态。不排除被子植物多系起源的可能性。

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