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Skull taller, blunter than ; broad se (on both sides), spatulate teeth, not confined to anterior jaw; longest known neck, up to 12 m (of about 22m overall length), with 19 vertebrae also a record); neck vertebrae ventrally braced by elongated, neck supported by interlocked cervical ribs under the cervical vertebrae extending caudally up to 3 vertebrae; vertebrae cleft in pectoral region; vertebrae highly pneumatized; forked tail chevrons (beginning at caudal #12); front and hind limbs almost equal (or hindlimbs longer than forelimbs?); limbs similar to . (责任编辑：) |