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Keywords from Image Description:
PZSLPage. Procolophon trigoniceps Procolophon trigoniceps Owen Broom Broom Owen Broom Shaw en Shoulder joint of the Platypus compared to mammallike reptiles Sc scapula Co coracoid Co procoracoid Proceedings of the Zoological Society of London org vol issue org page page published Broom text PDold PZSL Shoulders Evolutionary