The Collaborative International Dictionary of English v.0.48:

Pedionomus \Pedionomus\ prop. n.
   A genus of birds including the plains wanderer (Pedionomus
   torquatus) of New South Wales as its only species. It is the
   only genus of the family Pedionomidae of the order
   Passeriformes and the plains wanderer is the only species
   in the family. The total world population (as of ca. 2000) is
   estimated to be 5 to 10 thousand.

   Note: See also http://www.philipmaher.com/plains.htm.

   Syn: genus Pedionomus.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Pedionomus
    n 1: plain wanderer [syn: Pedionomus, genus Pedionomus]