sentences:  The neural arches of the vertebrae had tall, sloping laminae.The notarium (a structure consisting of fused vertebrae in the shoulder-region of some pterosaurs and birds) consisted of six fused trunk vertebrae, with their neural spines fused into a plate, on which the shoulder blades articulated with a depression on each side.The main part of the sternum was very deep, with a bowed front edge and a shallow, triangular keel.