ISBN: | 978-5-5123-6449-9 |
High Quality Content by WIKIPEDIA articles! The simians (infraorder Simiiformes) are the "higher primates" familiar to most people: the Old World monkeys and apes, including humans, (together being the catarrhines), and the New World monkeys or platyrrhines. Simians tend to be larger than the "lower primates" or prosimians.