Daspletosaurini

Daspletosaurins
Temporal range: Late Cretaceous, middle Campanian 80.1–75 Ma
Skeletal mount of Daspletosaurus torosus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: †Tyrannosauridae
Subfamily: †Tyrannosaurinae
Clade: †Daspletosaurini
Voris et al., 2020
Type species
Daspletosaurus torosus
Russell, 1970
Genera

Daspletosaurini is an extinct clade of tyrannosaurine dinosaurs that lived in Laramidia during the Late Cretaceous (Middle Campanian) period. It consists of two genera: Daspletosaurus and Thanatotheristes. Four species have been described in the two genera, namely Daspletosaurus torosus, Daspletosaurus horneri, Daspletosaurus wilsoni, and Thanatotheristes degrootorum. At one point all of them were assigned as specimens of D. torosus, but several papers since 2017 have found them to represent distinct species. Some researchers found anagenesis in the group, whether contained in a daspletosaurin clade or paraphyletic in respect to the lineage of tyrannosaurines leading up to Tyrannosaurus,[1][2][3] but a 2023 study refuted this theory on the basis of morphological and stratigraphical data.[4]

  1. ^ Carr, Thomas D.; Varricchio, David J.; Sedlmayr, Jayc C.; Roberts, Eric M.; Moore, Jason R. (2017). "A new tyrannosaur with evidence for anagenesis and crocodile-like facial sensory system". Scientific Reports. 7: 44942. Bibcode:2017NatSR...744942C. doi:10.1038/srep44942. PMC 5372470. PMID 28358353.
  2. ^ Voris, Jared T.; Therrien, Francois; Zelenitzky, 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. Bibcode:2020CrRes.11004388V. doi:10.1016/j.cretres.2020.104388. S2CID 213838772.
  3. ^ Warshaw, Elías A.; Fowler, Denver W. (2022). "A transitional species of Daspletosaurus Russell, 1970 from the Judith River Formation of eastern Montana". PeerJ. 10. e14461. doi:10.7717/peerj.14461. PMC 9703990. PMID 36452080.
  4. ^ Scherer, Charlie Roger; Voiculescu-Holvad, Christian (2023-11-28). "Re-analysis of a dataset refutes claims of anagenesis within Tyrannosaurus-line tyrannosaurines (Theropoda, Tyrannosauridae)". Cretaceous Research. 155 (In press): 105780. Bibcode:2024CrRes.15505780S. doi:10.1016/j.cretres.2023.105780. ISSN 0195-6671.