Figure 3.

Analyses of hemichordate phylogeny. Branches are drawn to scale (Kimura two-parameter distances) to emphasize the potential for artifacts because of unequal rate effects. The same topology was obtained from NJ with Kimura two-parameter distances (bootstrap values above each branch), gambit paralinear distances with correction for site-to-site variation (bootstrap values below each branch), and gambit MP (bootstrap values to the right of each branch). See text for details. Hemichordate classes (bold) and families are indicated (Right). S. barkleyii and H. planktophilus are undescribed species (33).