The Collaborative International Dictionary of English v.0.48:

Ascaphus \Ascaphus\ n.
   1. 1 the type genus of the Ascaphidae; in some
      classifications included in the family Leiopelmatidae.

   Syn: genus Ascaphus.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Ascaphus
    n 1: type genus of the Ascaphidae; in some classifications
         included in the family Leiopelmatidae [syn: Ascaphus,
         genus Ascaphus]