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The simians (infraorder Simiiformes) are the "higher primate
Primate

A primate is a member of the biological order Primates , the group that contains lemurs, the Aye-aye, Lorisidaes, galagos, tarsiers, monkeys, and apes, with the last category including humans....
s" familiar to most people: the monkey
Monkey

A monkey is a nonhuman primate mammal with the exception usually of the lemurs and tarsiers. More specifically, the term monkey refers to a subset of monkeys: any of the smaller longer-tailed catarrhine or platyrrhine primates as contrasted with the apes....
s and the ape
Ape

An ape is any member of the Hominoidea superfamily of primates. In less scientific language, it has various meanings, although it often excludes humans....
s, including human
Human

A human being, also human or man, is a member of a species of bipedalism primates in the family Hominidae . Mitochondrial DNA evidence indicates that modern humans originated in east Africa about 200,000 years ago....
s. Simians tend to be larger than the "lower primates" or prosimian
Prosimian

Prosimians are a group of mammals that includes all primates except monkeys and apes. They include, among others, lemurs, the Aye-aye, bushbaby, and tarsiers....
s.

simians are split into three groups. The New World monkey
New World monkey

New World monkeys are the four families of primates that are found in Central America and South America: Cebidae, Aotidae, Pitheciidae and Atelidae....
s in Platyrrhini parvorder split from the simian line about 40 million years ago (mya)
Mya (unit)

In astronomy, geology, and paleontology, mya or "m.y.a." is an abbreviation for "million years ago". Like the related unit bya, mya is traditionally written in lower case....
, leaving the Catarrhini
Catarrhini

Catarrhini is a parvorder of the Primates, one of the three major divisions of the suborder Haplorrhini. It contains the Old World monkeys and the apes ....
 parvorder occupying the Old World. This group split about 25 mya between the Old World monkeys and the apes.






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The simians (infraorder Simiiformes) are the "higher primate
Primate

A primate is a member of the biological order Primates , the group that contains lemurs, the Aye-aye, Lorisidaes, galagos, tarsiers, monkeys, and apes, with the last category including humans....
s" familiar to most people: the monkey
Monkey

A monkey is a nonhuman primate mammal with the exception usually of the lemurs and tarsiers. More specifically, the term monkey refers to a subset of monkeys: any of the smaller longer-tailed catarrhine or platyrrhine primates as contrasted with the apes....
s and the ape
Ape

An ape is any member of the Hominoidea superfamily of primates. In less scientific language, it has various meanings, although it often excludes humans....
s, including human
Human

A human being, also human or man, is a member of a species of bipedalism primates in the family Hominidae . Mitochondrial DNA evidence indicates that modern humans originated in east Africa about 200,000 years ago....
s. Simians tend to be larger than the "lower primates" or prosimian
Prosimian

Prosimians are a group of mammals that includes all primates except monkeys and apes. They include, among others, lemurs, the Aye-aye, bushbaby, and tarsiers....
s.

Classification and evolution

The simians are split into three groups. The New World monkey
New World monkey

New World monkeys are the four families of primates that are found in Central America and South America: Cebidae, Aotidae, Pitheciidae and Atelidae....
s in Platyrrhini parvorder split from the simian line about 40 million years ago (mya)
Mya (unit)

In astronomy, geology, and paleontology, mya or "m.y.a." is an abbreviation for "million years ago". Like the related unit bya, mya is traditionally written in lower case....
, leaving the Catarrhini
Catarrhini

Catarrhini is a parvorder of the Primates, one of the three major divisions of the suborder Haplorrhini. It contains the Old World monkeys and the apes ....
 parvorder occupying the Old World. This group split about 25 mya between the Old World monkeys and the apes. Earlier classifications split the primates into two large groups: the "Prosimii" (strepsirrhines and tarsier
Tarsier

Tarsiers are prosimian primates of the genus Tarsius, a Monotype genus in the family Tarsiidae, which is itself the lone extant family within the infraorder Tarsiiformes....
s) and the simians in "Anthropoidea"(an'thro-poy'de-a)(Gr. anthropos, human).

  • ORDER PRIMATES
    • Suborder Strepsirrhini
      Strepsirrhini

      The clade Strepsirrhini is one of the two suborders of primates. One of the most distinguishing characteristic of these 118 species is their wet noses, and it is this feature for which the grouping is named....
      : non-tarsier
      Tarsier

      Tarsiers are prosimian primates of the genus Tarsius, a Monotype genus in the family Tarsiidae, which is itself the lone extant family within the infraorder Tarsiiformes....
       prosimians
    • Suborder Haplorrhini
      Haplorrhini

      The haplorrhines, the "dry-nosed" primates , are members of the Haplorrhini Cladistics: the prosimian tarsiers and all of the true simians ....
      : tarsiers, monkeys and apes
      • Infraorder Tarsiiformes
        Tarsier

        Tarsiers are prosimian primates of the genus Tarsius, a Monotype genus in the family Tarsiidae, which is itself the lone extant family within the infraorder Tarsiiformes....
      • Infraorder Simiiformes
        • Parvorder Platyrrhini: New World monkeys
          • Family Cebidae
            Cebidae

            The Cebidae form one of the four family of New World monkeys now recognised. It includes the marmosets, tamarins, capuchin monkeys and squirrel monkeys....
            : marmosets, tamarins, capuchins and squirrel monkeys
          • Family Aotidae: night or owl monkeys (douroucoulis)
          • Family Pitheciidae
            Pitheciidae

            The Pitheciidae are one of the four family of New World monkeys now recognised. Formerly they were included in the family Atelidae. The family includes the titis, saki monkeys and uakaris....
            : titis, sakis and uakaris
          • Family Atelidae
            Atelidae

            The Atelidae are one of the four family of New World monkeys now recognised. Formerly they were included in the family Cebidae. Atelids are general larger monkeys, and the family includes the howler monkey, spider monkey and woolly monkeys....
            : howler, spider and woolly monkeys
        • Parvorder Catarrhini
          Catarrhini

          Catarrhini is a parvorder of the Primates, one of the three major divisions of the suborder Haplorrhini. It contains the Old World monkeys and the apes ....
          • Superfamily Cercopithecoidea
            Old World monkey

            The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily Cercopithecoidea in the clade Catarrhini....
            • Family Cercopithecidae
              Old World monkey

              The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily Cercopithecoidea in the clade Catarrhini....
              : Old World monkeys
          • Superfamily Hominoidea
            • Family Hylobatidae: gibbons
            • Family Hominidae
              Hominidae

              The Hominidae form a taxonomic biological family, including four extant genus: Homo s, chimpanzees, gorillas, and orangutans.A number of known extinct genera are grouped with humans in the Hominina subtribe, others with orangutans in the Ponginae subtribe....
              : great apes and humans


See also

  • Simia
    Simia

    In his Systema Naturae of 1758, Carolus Linnaeus divided the Order Primates into four genus: Homo , Simia, prosimian, and bat....
    , Carolus Linnaeus
    Carolus Linnaeus

    Carl Linnaeus was a Sweden botanist, physician, and zoologist, who laid the foundations for the modern scheme of binomial nomenclature. He is known as the father of modern alpha taxonomy, and is also considered one of the fathers of modern ecology....
    's original classification of these primates.