sentences:  Osteoderms appear only to have been present on the dorsal surface; they were in pairs sutured together, each pair corresponding to one dorsal vertebra or up to three cervical ones.The articulation between rows is minimal, limited to a slight overlap between rows next to each other.The osteoderms are trapezoidal in shape and quite pitted; they articulate via a facet in the centre of the suture with their corresponding vertebra, the top of the neural spine of which fits into the facet.