Phylogenetic biogeography using explicit geographic ranges, events, and distnaces

ARIAS, J. SALVADOR

Buenos Aires

Congreso; The XXXV Annual Meeting of the Willi Hennig Society; 2016

Willi Hennig Society

Phylogenetic biogeography studies are dominated by methods based on events. A major drawback of that methods is that they use ?predefined areas?. While there is a handful of biogeographic methods that use explicit geographic ranges in the terminals, they are limited to the inference of a single cladogenetic event (either sympatry or vicariance). Here I propose an event-based method which use explicit geographic ranges and a full set of cladogenetic events (vicariance, full-copy sympatry, punctual sympatry, and founder event). The cost of a reconstruction is estimated by the range changes on a branch (dispersal and extinction). The extinction cost is calculated as the area in the ancestor that is absent in the descendant. The dispersion cost, is calculated as the area present in the descendant that is absent in the ancestor, weighted by the distance of the added surface relative to the ancestral one. Then, the best reconstruction will be the assignation of cladogenetic event-ancestral range on internal nodes which minimize the overall cost.