solid and quite compact, and the neural canal rather thin, so the spinal cord would have been relatively well protected. Other features of the vertebra include multiple fossae or pits around the neural canal, especially just above it on the posterior side of the vertebra. These were present in many archosaurs and archosauromorphs, such as saurischian dinosaurs, pterosaurs, Erythrosuchus, Postosuchus and Arizonasaurus. The fact that Hypselorhachis shares them with Arizonasaurus may also be further evidence of its being closely related - although on their own they were so common that they would not suggest this, the presence of both the deep fossae and the high neural spine resembling that of Arizonasaurus is strong evidence to suggest that Hypselorhachis was indeed a ctenosauriscid, or at least a relative of the main ctenosauriscid group. References External links Discussion of "Hypselorhachis" on the DML Ctenosauriscids Triassic archosaurs Anisian life Middle Triassic reptiles of Africa Triassic Tanzania Fossils of Tanzania Fossil taxa described in 2009 Prehistoric pseudosuchian genera