Parasitology continues to benefit from taking an evolutionary approach to its study. Tree construction, character-mapping, tree-based evolutionary interpretation, and other developments in molecular and morphological phylogenetics have had a profound influence and have shed new light on the very nature of host-parasite relations and their coevolution. Life cycle complexity, parasite ecology and the origins and evolution of parasitism itself are all underpinned by an understanding of phylogeny. This volume aims to bring together a range of articles that exemplifies the phylogenetic approach as applied to various disciplines within parasitology and as applied by parasitologists. Unified by the use of phylogenies, this book tackles a wide variety of parasite-specific biological problems across a diverse range of taxa.