The Evolution of Artiodactyls - Google Books

https://books.google.de/books?id=qO8H_alEofAC&pg=PA118&lpg=PA118&dq=%22Anthracotherioidea%22+Hippopotamoidea&source=bl&ots=DpPtu

Artiodactyls are diverse and successful hoofed mammals, represented by nearly two hundred living species of pigs, peccaries, hippos, camels, deer, sheep, cattle, giraffes, and other even-toed ungulates.In the recent years, a tremendous amount of research…