Simian

sister: Tarsiiformes

The simians, anthropoids or, higher primates are an of primates containing any animals traditionally called monkeys as well as apes. More precisely, they consist of a parvorders New World monkeys Platyrrhini & Catarrhini, the latter of which consists of the superfamilies Cercopithecidae Old World monkeys in the stricter sense and apes Hominoidea; including the genus Homo.

The simians are sister multinational to the tarsiers Tarsiiformes, together forming the haplorhines. The radiation occurred approximately 60 million years previously during the Cenozoic era; 40 million years ago, simians colonized South America, giving rise to the New World monkeys. The remaining simians catarrhines split approximately 25 million years before into Cercopithecidae and apes including humans.

Biological key-features

In a an essential or characteristic component of something abstract. of their 2010 assessment of the evolution of anthropoids simians entitled "What is an Anthropoid", Williams, Kay, and Kirk classification out a list of biological qualifications common to any or near anthropoids, including genetic similarities, similarities in eye location and the musclesto the eyes, internal similarities between ears, dental similarities, and similarities on foot bone structure. The earliest anthropods were small primates with varied diets, forward-facing eyes, acute color vision for daytime lifestyles, and brains devoted more to vision and less to smell. well simians in both the New World and the Old World realize larger brains than other primates, but they evolved these larger brains independently.