Host repertoire
Functional-phylogenetic distances (FPDist) were calculated for all species of Cichlidogyrus with more than one host species (Appendix S5) with the weighting parameter a between 0 and 1. Plots for some species are shown in Fig. 4 to illustrate main patterns observed throughout the lineage. Generally, FPDist decreased with increasing phylogenetic weight (MPD or MNTD) as indicated by the falling trend of FPDist estimates (Fig. 4). Observed MPD and MNTD showed a significant pattern of underdispersion (clustering) compared to 1000 random simulations in some cases. Specifically, MPD metrics of FPDist became mostly significant if the weight of phylogenetic distances (PDist) increased (i.e. a → 1) (Fig. 4). In contrast, MNTD estimates were largely non-informative regardless of a . One exception is Cichlidogyrus sp. ‘nyanza’ (Gobbin et al.2021) with MNTD estimates being lowest for a → 0 (Fig. 4).