Figure 2: Host phylogeny and the host–parasite and host-supertype matrices.
From: Host–parasite network structure is associated with community-level immunogenetic diversity

(a) Host phylogeny. An ultrametric tree is presented for convenience. (b) Parasite prevalence: the fraction of individuals of a given host species (columns) infected by a given parasite (rows). Rows are sorted from the most generalist parasite to the most specialist one. (c) MHC supertype frequency: number of infected individuals of a given host species (columns) with a given supertype (rows), divided by the total number of individuals of that host harbouring that supertype. One supertype (no. 23) was not considered as it was not harboured by any infected individuals. Rows are sorted from the most widely distributed supertype among hosts to the most species-specific.