Phylogeny bolker - Phylogenetics How do we put together...

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1 Phylogenetics: How do we put together information from a collection of extant species (tree “leaves”) to make inferences about their evolutionary relationships, and about their ancestors? Should we avoid lumping convergently evolved taxa (e.g., hedgehogs and echidnas)? How? Phenetics Classic approach (Linnaeus) Group species based upon phenotypic similarity Use all traits Phylogenetics New (Hennig, 1966) Based on patterns of ancestry (species are groups based on most recent ancestry) uses only shared, derived characters (i.e., derived homologues ) aims to reveal actual evolutionary history (the “real” tree)
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