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Abstract
We investigate a neutral model for speciation and extinction, the constant rate birth-death
process. The process is conditioned to have n extant species today, we look at the
tree distribution of the reconstructed trees--i.e. the trees without the extinct species.
Whereas the tree shape distribution is well-known and actually the same as under the
pure birth process, no analytic results for the speciation times were known. We provide
the distribution for the speciation times and calculate the expectations analytically.
This characterizes the reconstructed trees completely. We will show how the results
can be used to date phylogenies.