31. Baboons are Old World monkeys that split from humans and apes on the primate family tree 30 million years ago. 32. The primatologists reported on 22 different primate species, including all the great apes, and various new and old world monkeys . 33. The Proboscis monkey is a reddish-brown arboreal Old World monkey that is endemic to the south-east Asian island of Borneo. 34. Compared to humans, Old World monkeys have far larger erector spinae muscles, which are the muscles hold the spine steady. 35. The ischial callosities are one of the most distinctive pelvic features which separates Old World monkeys from New World monkeys. 36. This family split off the lineage of Old World monkeys and apes sometime after the New World monkeys also split off. 37. The exception, the howler monkey, had lost 30 percent of its odor genes, just like the apes and Old World monkeys . 38. Their conclusion emerges from an attempt to make sense of the geographical distribution of living and fossil apes and Old World monkeys . 39. This genus includes the human-infecting Epstein Barr virus, as well as viruses that infect both Old World monkeys and New World monkeys. 40. There has been a shift from the subtelomeric regions of the Old World monkeys to the pericentromeric regions of the modern primate.
