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What is the smallest marsupial species?

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Red kangaroo (Macropus rufus) — marsupial Red kangaroo (*Macropus rufus*). The home range of this species spans much of Australia's interior, and it is the largest member of the family Macropodidae.

The smallest marsupial species are the planigales, particularly the long-tailed planigale (Planigale ingrami). These tiny animals measure barely 12 cm (4.7 inches) in total length.1