First Report of Gout in an Ornithomimid (Dinosauria: Theropoda) from the Horseshoe Canyon Formation, Alberta

Abstract

A spherical lesion on a pedal phalanx of an ornithomimid from the Scollard Formation of Alberta is diagnosed as gout. Gout is recognized in the absence of urate crystals by the presence of periarticular spherical lesions and smooth perilesional bone growth forming a characteristic overhanging "lip." This finding identifies gout in the Ornithomimosauria for the first time, confirming gout was present in theropods outside of the Tyrannosauridae