Thanatotheristes, Voris & Therrien & Zelenitsky & Brown, 2020

Voris, Jared T., Therrien, François, Zelenitsky, Darla K. & Brown, Caleb M., 2020, A new tyrannosaurine (Theropoda: Tyrannosauridae) from the Campanian Foremost Formation of Alberta, Canada, provides insight into the evolution and biogeography of tyrannosaurids, Cretaceous Research 110 (104388), pp. 1-15 : 3

Daspletosaurini clade nov.

ZOOBANK ID: urn:lsid:zoobank.org:act:B9FCE1A0-B6B7-41E4-95C0-44F17E34C118

Definition. The most inclusive clade that includes all taxa closer to

Daspletosaurus torosus than to Albertosaurus sarcophagus, Alioramus remotus, Teratophoneus curriei, or Tyrannosaurus rex.

Diagnosis. Daspletosaurini is diagnosed by the presence of an extremely coarse subcutaneous surface of the maxilla anteroventral to the antorbital fossa; a constricted jugal ramus of the maxilla; the anteroventral corner of the maxilla tapers into a shallow angle (<69) as measured between the alveolar margin of the first two alveoli and the anterior margin of the subcutaneous surface; a prefrontal that is broad in dorsal view and strongly dorsomedially arced in anterior view; and a dentary chin located ventral to either the third alveolus or third interdental plate. Daspletosaurins also differ from all other tyrannosaurines of subadult/adult size, except alioramins, in having no fewer than 14 maxillary teeth (see Carr et al., 2017).

Included taxa. Daspletosaurus torosus Russell (1970) , Daspletosaurus horneri Carr et al. (2017) , and Thanatotheristes degrootorum gen. et. sp. nov.