Figure 1.

Data points showing occurrence records of Late Cretaceous marine vertebrate specimens analysed in this study. Xiphactinus sp. (pink), Platecarpus sp. (dark green), Tylosaurus sp. (dark blue), Squalicorax kaupi (orange), Squalicorax falcatus (red), Rhinobatos incertus (light green), Ptychodus whipplei (white), Ptychodus mortoni (dark grey), Ptychodus anonymus (light grey) and Cretoxyrhina mantelli (yellow). Present day outcrop of Late Cretaceous sediments is also shown (brown). Scale bar, 0–500 km.