Fig. 2. Dendrogram (UPGMA) based on Nei's genetic distance (1972) of 11 wild populations of P. lunatus studied in four agricultural regions of the Yucatan Peninsula, Mexico. The numbers above the lines are the proportion of similar replicates supporting each node. South of Yucatan (SYUC), central eastern Quintana Roo (CEQROO), southeast of Yucatan (SEYUC), northeast of Campeche (NECAMP).