The amphicoelous vertebrae show no special details. They also all appear to be amphicoelous. These vertebrae had swollen neural arches, and amphicoelous notochordal centra. Amphicoelous centra often are integrated with a full notochord. They are slightly amphicoelous, with hollow centrum facets. The articular ends of the vertebra are rounded and concave on both sides (or amphicoelous). The centra are amphicoelous and notochordal, with swollen, relatively massive neural arches. Both ends of each vertebra are slightly concave, meaning that the vertebrae are amphicoelous. The caudal vertebrae were amphicoelous (concave anteriorly and posteriorly). All members of Stereospondyli had amphicoelous centra composed only of the intercentra. The vertebrae of "Askeptosaurus" were amphicoelous with no sign of pachyostosis. The tuatara spine is made up of hourglass-shaped amphicoelous vertebrae, concave both before and behind. The tail vertebrae were amphicoelous, the vertebral bodies on both ends being concave. Those behind are amphicoelous&colon; hollow at both ends. The dorsal vertebrae are amphicoelous, while the cervical centra lack hypapophyses.