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A–C, sacral vertebra 1 in anterior (A), posterior (B) and ventral (C) views. D–H, sacral vertebra 2 in anterior (D), dorsal (E), posterior (F), and ventral (G) views, and distal end of left sacral rib (H). Arrows in (C), (E), (G) and (H) point toward anterior. Abbreviations: s.sa1, surface for articulation with sacral rib 1; s.sa2, surface for articulation with sacral rib 2.
