Scientific classification: Rat-kangaroos are the only members of the subfamily Potoroinae in the kangaroo family, Macropodidae, of the order Marsupialia. The musky rat-kangaroo is classified as Hypsiprymnodon moschatus. The boodie is classified as Bettongia lesueur; the two other endangered betongs are classified as Bettongia penicillata and Bettongia tropica. The endangered potoroo species is classified as Potorous longipes.