been documented elsewhere in North America and these trackways represent the first reported encounter between notoriously different dinosaurs from North America. The diversity of the ichnotaxa in this site supports the idea of similar dinosaur faunas between Alaska and Asia during the Late Cretaceous period, specifically with the Nemegt Formation which had relatively wet environments. Fiorillo and colleagues suggested that Alaska represented a "gateway" for faunal exchange between the two continental landmasses and the existence of a "Cretaceous" Beringian land bridge further allowed this mixing of faunas, which was encouraged as similar habitats were present within Asia and North America. See also Timeline of therizinosaur research References External links Erlikosaurus restored 3D skull at Sketchfab Segnosaurus vertebra from The Theropod Database Blog Footprint of DMNH 2013-08-06 at Sketchfab Therizinosaurs Aptian first appearances Maastrichtian extinctions Taxa named by Evgeny Maleev Prehistoric dinosaur families