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Palaeobotanical redux: revisiting the age of the angiosperms

Published on Mar 1, 2017in Nature plants13.297
· DOI :10.1038/nplants.2017.15
Patrick S. Herendeen35
Estimated H-index: 35
,
Else Marie Friis51
Estimated H-index: 51
(Swedish Museum of Natural History)
+ 1 AuthorsPeter R. Crane60
Estimated H-index: 60
(Yale University)
Sources
Abstract
Angiosperms (flowering plants) are the most diverse of all major lineages of land plants and the dominant autotrophs in most terrestrial ecosystems. Their evolutionary and ecological appearance is therefore of considerable interest and has significant implications for understanding patterns of diversification in other lineages, including insects and other animals. More than half a century ago, influential reviews showed that while angiosperms are richly represented in sediments of Late Cretaceous and younger ages, there are no reliable records of angiosperms from pre-Cretaceous rocks. The extensive new macrofossil, mesofossil, and microfossil data that have accumulated since have confirmed and reinforced this pattern. Recently, however, molecular dating methods have raised the possibility that angiosperms may have existed much earlier, and there have been scattered reports of putative angiosperms from Triassic and Jurassic rocks. Critical assessment of these reports shows that, so far, none provide unequivocal evidence of pre-Cretaceous angiosperms. Angiosperms may ultimately be recognized from Jurassic or earlier rocks, but credible palaeobotanical evidence will require unambiguous documentation of the diagnostic structural features that separate angiosperms from other groups of extant and extinct seed plants. Molecular dating has suggested that angiosperms existed earlier than the Late Cretaceous. Scattered fossil evidence for Triassic or Jurassic angiosperms exists but this Review concludes that the case remains unproven at best.
  • References (93)
  • Citations (48)
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