1. It was formerly placed in the Teratosauridae, within the Theropoda . 2. This bird was a link between Theropoda dinosaurs and birds. 3. Modern phylogenetics place birds in the dinosaur clade Theropoda . 4. The first bird archeopteryx had many similarities with birds as well as Theropoda dinosaurs. 5. Among dinosaurs, the dagger-shaped transversely flattened teeth are only found with Theropoda . 6. The endocast features clarified the dissimilarity of the skull with those of basal position in Theropoda . 7. Molnar and Pledge gave no more precise determination than a Theropoda " incertae sedis ". 8. He placed the Stegosauria and Ornithopoda in the Ornithischia, and the Theropoda and Sauropoda in the Saurischia. 9. Setting aside the basal Saurischia, the rest of the Saurischia are split into the Sauropodomorpha and Theropoda . 10. Ruben has questioned for many years the theory that birds descend from small carnivorous dinosaurs ( Theropoda ).
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