FIGURE 2 in On The Role Of Assumptions In Cladistic Biogeographical Analyses

FIGURE 2: The history of a hypothetical area. A: ancestral area A, ancestral species 1; B: first split lead to the first cladogenetic event, with species 2 and 3 distributed respectively in areas B and C; C: second split divides area C into areas D (habited by species 4) and E (species 5); D: third split divides area E into areas F (species 6) and G (species 7); E: a population of species 6 disperses from area F into area B; F: the observable pattern shows a widespread taxon (species 7) occurring in both areas B and F.