Fig 1.
Various parasite host range hypotheses.
Hypothetical host and parasite phylogenies illustrating scenarios that can lead to two forms of host specificity: monoxenism and stenoxenism. Dotted branches indicate a single parasite species residing in multiple host species. These patterns may all occur in a single parasite clade, such as Pneumocystis, and distinguishing between them requires thorough host sampling and robust phylogenetic analysis.
Table 1.
Genetic distances (expressed as percentages) of mtLSU and mtSSU between Pneumocystis from closely related hosts.