These data sets come from previously published phylogenetic analyses, see Whidden 2020 and Lakner 2008. They contain 27, 29, 36, 41, 50, 50, 59, 64 taxa (in order). Whidden, Chris, et al. "Systematic exploration of the high likelihood set of phylogenetic tree topologies." Systematic Biology 69.2 (2020): 280-293. Lakner, Clemens, et al. "Efficiency of Markov chain Monte Carlo tree proposals in Bayesian phylogenetics." Systematic Biology 57.1 (2008): 86-103.