The Collaborative International Dictionary of English v.0.48:

pademelon \pad`e*mel"on\ n. (Zool.)
   Any of several small reddish-brown wallabies of scrubby areas
   of Australia and New Guinea, especially those belonging to
   the genus Thylogale; a paddymelon. See Wallaby
   [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

pademelon
    n 1: small reddish-brown wallabies of scrubby areas of Australia
         and New Guinea [syn: pademelon, paddymelon]