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Tyrannosaurus mcraeensis

Reptilia - Tyrannosauridae

Taxonomy
Tyrannosaurus mcraeensis was named by Dalman et al. (2024). Its type specimen is NMMNH P-3698, a partial skeleton, and it is a 3D body fossil. Its type locality is Staton-LaPoint locality, NMMNH L-353, which is in a Campanian/Maastrichtian terrestrial shale/sandstone in the Hall Lake Formation of New Mexico.

Synonymy list
YearName and author
2024Tyrannosaurus mcraeensis Dalman et al. p. 2 figs. 2-3

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
superfamilyTyrannosauroidea
familyTyrannosauridae
subfamilyTyrannosaurinae
tribeTyrannosauriniOlshevsky et al. 1995
genusTyrannosaurus
speciesmcraeensis

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Tyrannosaurus mcraeensis Dalman et al. 2024
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Diagnosis
ReferenceDiagnosis
S. G. Dalman et al. 2024Large tyrannosaurin distinguished from Tyrannosaurus rex (Fig. 4; SI) by the following characters (*autapomorphies): postorbital with low, posteriorly positioned cornual process; postorbital with anteriorly projecting prefrontal/frontal articular surfaces; squamosal with ventrally projecting quadratojugal process; squamosal with a concave medial margin; strong ridge bounding the anterior margin of the squamosal ventral pneumatic fossa; dentary very shallow posteriorly and with a convex posteroventral margin*; splenial with anteriorly positioned apex*; splenial with shelf-like dentary overlap*, splenial with deep, posteriorly directed angular process; prearticular weakly bowed*; small ventral prearticular-angular contact; articular T-shaped in dorsal/ventral view; retroarticular process deep and quadrangular in posterior view.