The Virginia opossum is the original animal named "opossum". The word comes from Algonquian wapathemwa meaning "white animal". Colloquially, the Virginia opossum is frequently called simply "possum".
Water opossum was created in 1780.
Virginia opossum is the smallest. They also have muskrats.
Agricola's gracile opossum was created in 1943.
Linnaeus's mouse opossum was created in 1758.
Bushy-tailed opossum was created in 1912.
Unduavi gracile opossum was created in 1931.
Rufous mouse opossum was created in 1888.
Big-eared opossum was created in 1826.
Derby's woolly opossum was created in 1841.
Guahiba gracile opossum was created in 1931.
Chacoan pygmy opossum was created in 1930.