A phylo object with 50 tips containing GTDB-format taxonomic labels
spanning 5 coded phyla (P1, P2, P3, P4, P5) and 10 coded classes (C1, ..., C10)
for demonstration and testing purposes. Branch lengths are in Ma (mega-annum).
This tree is fully bifurcating with proper monophyletic groups at all
taxonomic levels. All labels are artificial codes, not real taxon names.
Usage
data(example_tree)