I'd like to suggest OneZoom for exploring these relationships.
http://www.onezoom.org/life/@Hippopotamidae=510764?img=best_...
425 karma · joined April 7, 2011
http://www.onezoom.org/life/@Hippopotamidae=510764?img=best_...
http://blogs.msdn.com/b/b8/archive/2012/06/14/building-the-m...