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RE: Therizinosaur track from Denali National Park, Alaska

*Balaur* also has an enlarged, forward-pointing pedal digit I.  The Alaska 
track is missing the tips of digit I and II, so we cannot be sure they did not 
have the large raised claws of a similar dromaeosaurid.  Now THAT would be some 
fascinating biogeography...

Fiorillo and Adams (2012) refer the Alaska track to *Saurexallopus* isp..  Does 
this imply that they also consider *S. lovei* and *S. zerbsti* to also be 
therizinosauroid tracks, or are ichnotaxa still irrespective of phylogeny?