References / paperRecent synchronous radiation of a living fossil
Nagalingum, N.S.; Marshall, C.R.; Quental, T.B.; Rai, H.S.; Little, D.P.; Mathews, S.
Year2011
Source roleprimary-study
DOI / ID10.1126/science.1209926
Fitness and scope
range · taxonomy · geochronology
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Claim ledger
divergence-time · mediumA 2011 fossil-calibrated molecular analysis inferred that most sampled living cycad species originated within roughly the preceding 12 million years, but later fossil-integrated work weakens a simple globally synchronous-radiation narrative; none of these models dates the origin or fossil first appearance of Cycadales.
claim:event:living-cycad-radiation-model