Proavis is a hypothetical extinct species or hypothetical extinct taxon. The term was coined in the early 20th century in an attempt to support and explain the hypothetical evolutionary steps and anatomical adaptations leading from non-avian theropod dinosaurs to birds.
Proavis is a hypothetical extinct species or hypothetical extinct taxon. The term was coined in the early 20th century in an attempt to support and explain the hypothetical evolutionary steps and anatomical adaptations leading from non-avian theropod dinosaurs to birds.
Source: Wikipedia "Proavis" · CC BY-SA 4.0
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