Fig. 5

Gorgonocephalid gen. et sp. indet. from the Peedee Formation (upper Maastrichtian, Upper Cretaceous) at the road ramp construction site in North Myrtle Beach (Horry County, South Carolina), a Mnhnl OPH054, dissociated proximal vertebra in distal (1), lateral (2) and proximal (3) views; b MnhnL OPH055, dissociated proximal lateral arm plate in external (1) and internal (2) views, and with detail of spine articulations (3) Squamophis? sp. indet. from the Peedee Formation (upper Maastrichtian, Upper Cretaceous) at the road ramp construction site in North Myrtle Beach (Horry County, South Carolina), c Mnhnl OPH057, dissociated lateral arm plate in external (a) and internal (b) views, and with detail of spine articulation in distal (c) view; d MnhnL OPH058, dissociated vertebra in distal (a), lateral (b) and proximal (c) views. Abbreviations: di: distal; do: dorsal; MO: muscle opening; NO: nerve opening; pr: proximal. Scale bars equal 0.5 mm (a–e, h–l) and 0.1 mm (f–g)