Tarzan

Tarzan uses an event-based method to find cost Minimal or reconstructions or reconstructions that have a minimal (or maximal) number of certain evolutionary events. Five different types of evolutionary events are considered: cospeciation, duplication, sorting, switching, and extinction. For host Parasite systemes cospeciation events refer to simultaneous host and parasite speciation, duplication events are independent parasite speciations, sorting events correspond to lineage sorting, and switches correspond to host shifts.