(A) Phylogeny of family Lymnaeidae by Correa et al. (2011) highlighting known intermediate hosts confirmed under natural conditions. Suitable intermediate host are Radix (syn. Lymnaea) peregra, Lymnaea palustris, Fossaria bulimoides, Galba truncatula and Stagnicola caperata. (B) Phylogeny of family Cervidae by Pitra et al. (2004) highlighting suitable definitive hosts confirmed under natural conditions (currently no study has described subspecies of Cervus elaphus as a definitive host in Europe, thus this is not highlighted). Proper definitive hosts Fascioloides magna are C. capreolus, C. e. canadensis, Dama dama, Rangifer tarandus, Odocoileus hemionus, and O. virginianus.