Perissodactyla
Perissodactyla
Perissodactyla (pronunciation: /pɛrɪsoʊdækˈtaɪlə/) is an order of mammals, also known as odd-toed ungulates. This order includes three extant families: Equidae (horses), Rhinocerotidae (rhinoceroses), and Tapiridae (tapirs).
Etymology
The term "Perissodactyla" comes from the Ancient Greek words "perissos" (περισσός), meaning "odd", and "daktylos" (δάκτυλος), meaning "finger" or "toe". This refers to the characteristic odd number of toes in the members of this order.
Characteristics
Members of the Perissodactyla order are characterized by an odd number of toes on each hoof, with the middle toe usually being the largest. They are also known for their simple stomachs and hindgut fermentation, which allows them to extract nutrients from plant material.
Families
- Equidae: This family includes horses, donkeys, and zebras. They are known for their single hoofed toe and their ability to run at high speeds.
- Rhinocerotidae: This family includes the five extant species of rhinoceros. They are characterized by their large size and the presence of one or two horns on their snouts.
- Tapiridae: This family includes the four species of tapirs. They are known for their distinctive, elongated snouts.
Related Terms
- Ungulate: A diverse group of large mammals, most of which use the tips of their toes, usually hoofed, to sustain their whole body weight while moving.
- Even-toed ungulate: The order Artiodactyla, which includes pigs, peccaries, hippopotamuses, camels, llamas, alpacas, mouse deer, deer, giraffes, antelopes, sheep, goats, and cattle.
External links
- Medical encyclopedia article on Perissodactyla
- Wikipedia's article - Perissodactyla
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