Fossil rosids are known from the Cretaceous period. Molecular clock estimates indicate that the rosids originated in the Aptian or Albian stages of the Cretaceous, between 125 and 99.6 million years ago (mya).
References [change | change source]Edit
- ↑ Hengchang Wang et al 2009. Rosid radiation and the rapid rise of angiosperm-dominated forests. Proceedings of the National Academy of Sciences 106 (10): 3853–3858. 
- ↑ Robert W. Scotland & Alexandra H. Wortley 2003. How many species of seed plants are there? Taxon 52 (1): 101–104. 
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