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Opossum

Didelphidae
Temporal range: Early Miocene–Recent
Opossum 2.jpg
Virginia opossum (Didelphis virginiana)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Marsupialia
Order: Didelphimorphia
Gill, 1872
Family: Didelphidae
Gray, 1821
Genera

Several; see text


Several; see text

The opossums, also known as possums, are marsupial mammals of the order Didelphimorphia /dˌdɛlfˈmɔːrfiə/). The largest order of marsupials in the Western Hemisphere, it comprises 103 or more species in 19 genera. Opossums originated in South America, and entered North America in the Great American Interchange following the connection of the two continents. Their unspecialized biology, flexible diet, and reproductive habits make them successful colonizers and survivors in diverse locations and conditions.

The word "opossum" is borrowed from the Virginia Algonquian (Powhatan) language and was first recorded between 1607 and 1611 by John Smith (as opassom) and William Strachey (as aposoum). Both men encountered the language at the British settlement of Jamestown, Virginia, which Smith helped to found and Strachey later served as its first secretary. Strachey's notes describe the opossum as a "beast in bigness of a pig and in taste alike," while Smith recorded it "hath an head like a swine ... tail like a rat ... of the bigness of a cat." The Powhatan word ultimately derives from a Proto-Algonquian word (*wa·p-aʔθemw-) meaning "white dog or dog-like beast."

The opossum is also commonly known as a possum, particularly in the Southern United States and Midwest. Following the arrival of Europeans in Australia, the term "possum" was borrowed to describe distantly related Australian marsupials of the suborder Phalangeriformes, which are more closely related to other Australian marsupials such as kangaroos.


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