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The August issue of _Cretaceous Research_ has an article on four-toed
theropod footprints from the Late Cretaceous of Wyoming (Harebell
Formation, Maastrichtian, NW Wyoming). The authors are convinced that
the footprints belong to a theropod (digital proportions, sharp
claws), but throw their arms in the air on the question of _what
kind_ of theropod their owners are.
I haven't read the article yet, just the abstract. Is it possible
that these four-toed theropods are segnosaurs (therizinosauroids to
some) - the first evidence of such from North America.