Family: Ascaphidae

  The family Ascaphidae is a primitive family as evidenced by a higher than normal number of vertebrae (9 presacral), the vertebrae shape, the presence of ribs and a high chromosome number (Nussbaum et al. 1983). The family is represented by a single living species, the Tailed Frog (Ascaphus truei).  This species is endemic to the Pacific Northwest (Pough et al. 1998).

Ascaphus truei
Tailed Frog

Written by John Cossel Jr., 1997
Photos by Charles R. Peterson
, 1997