From left to right: the ancestral neotheropod (220 million years old), the ancestral tetanuran (200 myo), the ancestral coelurosaur (175 myo), the ancestral paravian (165 myo) and the ancestral avialan (150 myo). (ibtimes.com)
«How can you test this hypothesis if you are not including any tetanuran in your analysis?» (sciencemag.org)
From left to right: a neotheropod, a tetanuran, a coelurosaur, a paravian and Archaeopteryx (Image: Davide Bonnadonna) (newscientist.com)