Abstract
The close relationships which link parasitic organisms to their hosts have led to the use of parasites as biological tags. Most studies on this topic refer to parasites as host ecological tags. Recent development of molecular methods which give access to the genomic structures of populations have provided new information on the evolutionary biology of parasites. In this paper, we have attempted to review whether parasites can be considered as "host evolutionary prints", and focus our discussion on host biodiversity and biogeography.