A fossilized birth-death model for fossil records lacking sampled ancestors
Fossilized birth-death (FBD) models provide a powerful framework for estimating diversification from phylogenies that include fossil taxa. However, the original formulation makes a key assumption that sampled ancestors (k-type fossils) should be commonly observed. Beaulieu and O'Meara (2023) showed that this assumption is often violated in empirical datasets, where fossils are represented mostly…
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