Best Arboreal

Lumholtz's tree-kangaroo is a small arboreal macropod of Queensland's Atherton Tableland, described by Collett in 1884 and named for Carl Lumholtz.

The black-shouldered opossum is the sole species of Caluromysiops, described in 1951 and known from western Brazil and southeastern Peru.

The bare-tailed woolly opossum is a South American Caluromys described by Linnaeus in 1758, known for a woolly coat and partly naked prehensile tail.

Derby's woolly opossum is a Neotropical Caluromys described in 1841, ranging from southern Mexico to western Ecuador and Colombia.

The lowlands tree-kangaroo is a vulnerable Papua New Guinea species, described in 1936 and notable for inhabiting southern New Guinea lowland rainforest.

The ifola is a Papua New Guinea tree-kangaroo, described by Matschie in 1916 and now often treated as a species separate from Doria's tree-kangaroo.

Seri's tree-kangaroo is a montane New Guinea species, described by Flannery and Seri in 1990 and elevated from Doria's tree-kangaroo in 2005.