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Binomial Name. Archaeopteryx lithographica. Archaeopteryx is an extinct bird that evolutionists argue possesses some reptilian-like features causing it to be classified as a evolutionary transitional form, and is considered the first of the so called feathered dinosaurs.inomial Name. Archaeopteryx lithographica. Archaeopteryx is an extinct bird that evolutionists argue possesses some reptilian-like features causing it to be classified as a evolutionary transitional form, and is considered the first of the so called feathered dinosaurs.
True archosaurs (the Archosauria proper), including the major stem groups Pseudosuchia (the crocodilians and their relatives) and the Ornithosuchia (the birds and their relatives) evolved yet more new features.