catarrhinian

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Definition

Adjective: * Pertaining to catarrhine primates: Relating to or characteristic of the parvorder Catarrhini, a group of Old World monkeys, apes, and humans. The defining anatomical feature is nostrils that are close together and open downward, as opposed to sideways. * Having downward-facing nostrils: Describing an animal, specifically a primate, whose nostrils are positioned close together and point downward.

Usage

This is a highly specialized, scientific term used primarily in zoology, physical anthropology, and primatology. It is not used in everyday conversation.

  • The catarrhinian lineage includes species such as baboons, macaques, and gorillas.
  • Anatomists study the catarrhinian skull structure to understand primate evolution.
  • Humans are classified as catarrhinian primates.
Advanced Usage
  • The term is often used in contrast with platyrrhine (New World monkeys, which have nostrils that are wide apart and open sideways).
  • It can be used in phylogenetic contexts to discuss the evolutionary split between the catarrhinian (Old World) and platyrrhine (New World) primate lineages.
Variants and Related Words
  • Catarrhine (noun/adjective): The more common variant spelling and form. A member of the Catarrhini parvorder.
    • The chimpanzee is a catarrhine.
  • Catarrhini (noun, plural): The scientific name for the parvorder itself.
    • The parvorder Catarrhini diverged from platyrrhines millions of years ago.
Synonyms
  • Old World monkey/ape (in a broad, non-scientific sense, though this is not perfectly accurate as "catarrhinian" includes apes and humans, not just monkeys).
  • Downward-nosed primate (descriptive synonym).
Antonyms
  • Platyrrhinian / Platyrrhine (adjective): Pertaining to New World monkeys with nostrils wide apart and opening sideways.
Adjective
  1. of or related to Old World monkeys that have nostrils together and opening downward

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