Fig. 4
From: Arms Race Coevolution: The Local and Geographical Structure of a Host–Parasite Interaction
Association between spine length and parasite infection in Chilean species of Echinopsis and Eulychnia. Spine length is depicted as squares over branches in the phylogeny, and the associated parasite prevalence is depicted in circles. Values of prevalence represent mean values in a range of 2–10 populations per cactus species. We used Corryocactus brevistylus, Browningia hertlingiana, and Oreocereus leucotrichus for outgroup-rooting in molecular phylogenetic reconstructions