Fig. 5.

Phylogenetic tree for relevant snails based on Bayesian analysis of cox1 with nodal support indicated on the branches by posterior probabilities as asterisk for >0.98. The clade for G. humilis is outlined in a dark gray box, light gray box are G. cubensis, the other species found infected in nature. The samples from this study examined for Heterobilharzia americana infections and/or used in experimental exposures are in bold. The relevant sample from Utah is noted with black circle. Additional taxa examined in New Mexico are from the MSB Parasite Division. Taxa are preceded with their corresponding GenBank accession number and followed by their collection locality (U.S. state or country). See Table 1 for accession numbers and MSB numbers.