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The cladistic relationships of Archaeopteryx, the earliest known bird, are re-examined and previous hypotheses of relationships evaluated. The morphology of Archaeopteryx is redescribed. New interpretations of the fossils are presented, particularly in regard to the morphology of the pectoral girdle, manus, pelvic girdle, tarsus and pes. These new interpretations challenge some of the phvlogenetic hypotheses recently presented and a new version of rhecodontian relationships is suggested.

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