FIGURE 20. 50 percent majority rule tree showing a in A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922

FIGURE 20. 50 percent majority rule tree showing a hypothesis of relationship for Plesiosauria based on a Bayesian analysis of 31 OTUs and 152 characters. Branch support is indicated by posterior probabilities greater than or equal to 50.