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. 2014 Jan 6;9(1):e84184. doi: 10.1371/journal.pone.0084184

Figure 1. Sketches of a tree produced by a birth-death process.

Figure 1

The process starts with a single lineage at the origin. At each speciation event the ancestral lineage is replaced by two descendant lineages. At an extinction event the lineage simply terminates. a) A complete tree including the extinct lineages. b) The reconstructed tree of tree a) without the extinct lineages. c) A randomly sampled tree of the same reconstructed tree. Every taxa had the same probability Inline graphic to be sampled. d) A five-taxon tree where taxa are selected to maximize diversity (diversified sampling).