The Collaborative International Dictionary of English v.0.48:

gridiron-tailed lizard \gridiron-tailed lizard\ n.
   a lizard having a long tail with black bands (Callisaurus
   draconoides), which lives in the deserts of the southwestern
   U. S. and Mexico; called also zebra-tailed lizard. --RHUD
   [PJC]

The Collaborative International Dictionary of English v.0.48:

zebra-tailed lizard \ze"bra-tailed liz`ard\ n.
   A lizard having a long tail with black bands (Callisaurus
   draconoides), which lives in the deserts of the southwestern
   U. S. and Mexico; called also gridiron-tailed lizard.
   --RHUD
   [PJC]

WordNet (r) 3.0 (2006):

gridiron-tailed lizard
    n 1: swift lizard with long black-banded tail and long legs; of
         deserts of United States and Mexico [syn: zebra-tailed
         lizard, gridiron-tailed lizard, Callisaurus
         draconoides]