Species trees B and U for five species (⁠$A,B,C,D, and E$⁠) used to simulate data for the A01 analyses. For balanced species tree B, the parameters used are τ_R = 5θ, τ_S = 4.8θ, τ_T = 4.7θ, and τ_U = 4.8θ. For unbalanced species tree U, we used τ_R = 5θ, τ_S = 4.8θ, τ_T = 4.6θ, and τ_U = 4.4θ. In each tree, two values of θ are used: 0.0025 and 0.01.