Taxonomic Status of Nanotyrannus lancensis (Dinosauria: Tyrannosauroidea) - A Distinct Taxon of Small-Bodied Tyrannosaur Author Longrich, Nicholas R. https://orcid.org/0000-0002-9586-8907 Department of Life Sciences, University of Bath, Claverton Down, Bath BA 2 7 AY, UK nrl22@bath.ac.uk Author Saitta, Evan T. https://orcid.org/0000-0002-9306-9060 Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA evansaitta@gmail.com text Fossil Studies 2024 2024-01-03 2 1 1 65 http://dx.doi.org/10.3390/fossils2010001 journal article 285798 10.3390/fossils2010001 5a77e9a4-5367-4312-8bb1-e6f6b3085f39 10535269

Table 1. Taxonomy of Tyrannosaurus and late Maastrichtian Tyrannosaurini.

Taxon	Publication	Specimen	Status
Ornithomimus grandis	Marsh 1890 [21]	USNM 2110	Tyrannosaurus indet.
Manospondylus gigas	Cope 1892 [22]	AMNH 3982	Tyrannosaurus indet.
Dynamosaurus imperiosus	Osborn 1905 [6]	AMNH 5866/BMNH R7995	Tyrannosaurus rex
Tyrannosaurus rex Albertosaurus megagracilis	Osborn 1905 [6] Paul 1988 [23]	AMNH 973/CM 9380	Tyrannosaurus rex Tyrannosaurus indet.
Dinotyrannus megagracilis	Olshevsky 1995 [24]		Tyrannosaurus indet.
Tyrannosaurus “x”	Larson 2008 [16]	AMNH 5027	T. rex or T. imperator?
Tyrannosaurus imperator	Paul et al. 2022 [18]	FMNH PR 2081	T. rex or T. imperator?
Tyrannosaurus regina	Paul et al. 2022 [18]	USNM 555000	Tyrannosaurus indet.
Gorgosaurus lancensis	Gilmore, 1946 [27]	CMNH 7541	Nanotyrannus lancensis or Tyrannosaurus (?)
Albertosaurus lancensis	Paul, 1988 [23]	CMNH 7541	Nanotyrannus lancensis or Tyrannosaurus (?)
Nanotyrannus lancensis	Bakker et al., 1988 [30]	CMNH 7541	Nanotyrannus lancensis or Tyrannosaurus (?)
Aublysodon molnari	Paul, 1988 [23]	LACM 28471	Nanotyrannus lancensis, Stygivenator molnari, or Tyrannosaurus (?)
Stygivenator molnari	Olshevsky, 1995 [24]	LACM 28471	Nanotyrannus lancensis, Stygivenator molnari, or Tyrannosaurus (?)