Fig. 1 - Albertosaurus sarcophagus OSBORN 1905 in Possible evidence of gregarious behavior in Tyrannosaurids

Fig. 1 - Albertosaurus sarcophagus OSBORN 1905 metatarsals (right) collected by Barnum Brown in the Horseshoe Canyon Formation of Alberta, Canada. From left to right, AMNH 5229 (individual 2 oITABLE I), AMNH 5233 (individual 3), AMNH 5234 (individual 4), and AMNH 5232 (individual 8). See TABLE I for measurements.