THEORIES AS TO ORIGIN, ANCESTRY, AND ADAPTIVE RADIATION 



777 



Figure 705. — Phylogenetic tree of the Perissodactyla, showing the superfamily, family, and subfamily branches 



' Adaptive 



radiaiiorL of the 



subfamUies of 



Peri^sodcLcfyls 



IIcd)Lts an<L fhcd)itais 



MEDIPORTAL ({"'Km GRAVI portal ©"B-^ 



Figure 706. — Family tree of the Perissodactyla, showing the convergence of different branches through 

 adaptive radiation in similar habitats and adaption to similar habits 



