“…The prime example is hadrosauroids, which underwent a significant late Campanian-Maastrichtian disparity decrease in North America but a possible increase in Asia (which, although insignificant, is consistently found when all four metrics are subject to rarefaction). Almost all work on Late Cretaceous dinosaur diversity and abundance has focused either on pooled global datasets or the North American record, which is understandable given the relatively limited number of quality Campanian-Maastrichtian dinosaur fossils from other continents and the detailed stratigraphic understanding of the well-sampled Hell Creek Formation [4][5][6][7][8] . It may be, however, that the North American record represents a local anomaly.…”