Fig. 2From: Views from Understanding Evolution: Parasites and Pathogens Take the LeapA branch of the tapeworm phylogeny showing which worm lineages made the leap to human hosts. Lineages shown in gray are less closely related to lineages parasitizing humans. Notice that the worms hosted by humans are most closely related to worms parasitizing large African mammals (Hoberg et al. 2001)Back to article page