Figure 4

The phylogenetic tree, used to generate independent contrasts, representing the relationships among the trematode parasitic castrator species and uninfected snail hosts. Trematode species codes and names are in Figure 1 and Additional file, Table S1. "Female" and "male" are uninfected California horn snails, Cerithidea californica. Letters represent the position of contrasts indicated in Figures 3B, 4B, and 4D. Tree composed following Hechinger et al. [10], using information from Olsen et al. [97] and Yamaguti [98].