The Collaborative International Dictionary of English v.0.48:
Phascolarctos \Phascolarctos\ prop. n. A genus of animals consisting of the koalas. Syn: genus Phascolarctos. [WordNet 1.5]WordNet (r) 3.0 (2006):
Phascolarctos n 1: koalas [syn: Phascolarctos, genus Phascolarctos]