Figure S1 Because empirical estimates of how parasite diversity varies across the geographic range of hosts are lacking, we explored how using 5, 20 and 50% truncation of parasite ranges would alter spatial patterns using the southern-bias scenario (where parasite distributions are limited from the northern-most regions).

Figure S2 Latitudinal patterns in total parasite species richness with complete matching of host and parasite ranges for northern (a), southern (b), central (c) and marginal (d) biases relative to the distributions of their hosts.

Table S1 Estimates of total and specialist parasite species richness for 29 species of North American carnivores.

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