Fig. 8

Different skull shapes in Phorusrhacidae as exemplified by aKelenken guillermoi (long, relatively low rostrum); and bPatagornis marshi (tall, relatively short rostrum). The proportions of the rostrum fragment PIMUZ A/IV 122, referred to Phorusrhacos longissimus, suggest that this taxon had a long, relatively low rostrum. The area in gray in a shows the approximate position of PIMUZ A/IV 122 on the rostrum. Modified after Bertelli et al. (2007)