Yao-Wu Xing and his team at the Xishuangbanna Tropical Botanical Garden have long been examining the paleobotanical record to infer patterns of diversification (Xing et al. 2016). To address the two abominable mysteries we had set out to solve, the age of flowering plants and the age differences between rocks and clocks, Xing and his team compiled the largest flowering plant fossil data set to date. The dataset includes ~15,000 fossil occurrences across 198 flowering plant families. To complement this, we used the living diversity of the families in the fossil dataset (Christenhusz and Byng 2016).
Li, HT., Yi, TS., Gao, LM. et al. Origin of angiosperms and the puzzle of the Jurassic gap. Nature Plants(2019): https://doi.org/10.1038/s41477-019-0421-0.
Xing, Y., Gandolfo, MA, Onstein, RE. et al. Testing the biases in the rich Cenozoic angiosperm macrofossil record. International Journal of Plant Sciences (2016): https://doi.org/10.1086/685388.
Christenhusz, MJM. and Byng, JW. The number of known plants species in the world and its annual increase. Phytotaxa(2016): http://dx.doi.org/10.11646/phytotaxa.261.3.1.
Magallón, S., Gómez‐Acevedo, S., Sánchez‐Reyes, LL. et al. A metacalibrated time‐tree documents the early rise of flowering plant phylogenetic diversity. NewPhytologist(2015): https://doi.org/10.1111/nph.13264.