Theropods are no longer saurischians

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AnonymousLlama428's avatar
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This scientific paper is supposed to come out tomorrow, so I guess I'm posting extra early. ;)
Pleasantries aside, this new vid by London's NHM and the corresponding scientific paper has left me quite astounded.

Saurischia now comprises of Herrerasauridae and Sauropodomorpha, but excludes Theropoda, which has closer affinities to Ornithischia, such that they form their own new monophyletic clade, Ornithoscelida.
Ornithoscelida by AnonymousLlama428
Figure 1 | Phylogenetic relationships of early dinosaurs. Time calibrated strict consensus of 94 trees from an analysis with 73 taxa and 457 characters (see Supplementary Information). A, the least inclusive clade that includes Passer domesticus, Triceratops horridus and Diplodocus carnegii—Dinosauria, as newly defined. B, the least inclusive clade that includes P. domesticus and T. horridus—Ornithoscelida, as defined.  C, the most inclusive clade that contains D. carnegii, but not T. horridus—Saurischia, as newly defined. For further information on definitions see Table 1. All subdivisions of the time periods (white and grey bands) are scaled according to their relative lengths with the exception of the Olenekian (Early Triassic), which has been expanded relative to the other subdivisions to better show the resolution within Silesauridae and among other non-dinosaurian dinosauromorphs.

The paper:
www.nature.com.sci-hub.cc/natu…
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