Fig. 2.

Time-calibrated phylogeny of the Archaeplastida. Branching order of the tree was inferred under maximum-likelihood analysis from an aligned amino acid, concatenated dataset of 263 nuclear genes. Numbers on branches represent bootstrap and posterior probability values, respectively. Branch lengths, corresponding to time, were inferred under the CIR relaxed clock model using 16 most clock-like genes as determined by Sortadate. Blue bars correspond to the inferred 95% HPD interval for each node. Red bubbles correspond to calibrated nodes (Table 1), and blue bubbles correspond to key divergences among the volvocine algae (Figure S4B). Members of the multicellular volvocine algae (Tetrabaenaceae, Goniaceae, and Volvocaceae) are denoted in orange, purple, and green. Taxa in black font are unicellular volvocine algae