Clade | |
Subclade |
Taxon | |
Taxon |
Tyrannosaurinae
|
Nominal Author | Osborn 1906 |
2nd Nominal Author | Matthew and Brown 1922 |
Taxon Status | ACTIVE |
Comments | Sereno (1998) was first to define Tyrannosaurinae as a stem-based taxon and has been followed in this regard by later authors (Holtz 2001, Currie et al. 2003, Holtz et al. 2004). The object is to define a clade of tyrannosaurids that are most closely related to Tyrannosaurus rex. Sereno (1998) used Daspletosaurus in addition to Gorgosaurus and Albertosaurus as external specifiers; Holtz (2001, 2004) used Aublysodon and then Albertosaurus; Currie et al. (2003) used Albertosaurus. It seems most useful to exclude both Albertosaurus sarcophagus and Gorgosaurus libratus, as these two among tyrannosaurids are clearly not the closest relatives of Tyrannosaurus rex. The active definition, thus, is a first-order revision of the definition proposed by Currie et al. (2003) and Holtz (2004:127). |
Potential Synonomy |
Active Phylogenetic Definition | |
Active Definition |
The most inclusive clade containing Tyrannosaurus rex Osborn 1905 but not Gorgosaurus libratus Lambe 1914, Albertosaurus sarcophagus Osborn 1905.
|
Shorthand |
> Tyrannosaurus rex but not Gorgosaurus libratus, Albertosaurus sarcophagus. |
Definitional Author |
Sereno 2005 |
Definition Status | checked |
Definition Type | STEM |
Node-Stem Triplet | STEM |
Other Triplet Taxa |
Tyrannosauridae, Albertosaurinae |
Specifiers | |
Specifier(s) A |
Tyrannosaurus rex |
Specifier(s) B | |
Specifier(s) C |
Gorgosaurus libratus, Albertosaurus sarcophagus
|
Qualifiers | |
+Taxon | |
-Taxon | |
Datum | |
Taxonomic Content | |
Publication Year |
Unknown Unknown Unknown 2003 |
Inactive Taxon Status | |
Rejection Criteria | |
Critique | |
Definitional History #1 | |
Earliest Record | All tyrannosaurids closer to Tyrannosaurus than to either Albertosaurus, Daspletosaurus, or Gorgosaurus. |
Latest Record | Sereno 1998:65 |
Range (My) | |
Range (My) |
Tyrannosaurus, Albertosaurus, Daspletosaurus, Gorgosaurus |
Range (My) |
Definitional History #2 | |
Earliest Record | Tyrannosaurus and all taxa sharing a more recent common ancestor with it than with Aublysodon. |
Latest Record | Holtz 2001:66 |
Range (My) | |
Range (My) |
Tyrannosaurus, Aublysodon |
Range (My) |
Definitional History #3 | |
Earliest Record | All taxa closer to Tyrannosaurus than Albertosaurus. |
Latest Record | Currie et al. 2003:230 |
Range (My) | |
Range (My) |
Tyrannosaurus, Albertosaurus |
Range (My) |
Definitional History #4 | |
Earliest Record | Tyrannosaurus rex and all taxa sharing a more recent common ancestor with it than with Albertosaurus sarcophagus. |
Latest Record | Holtz 2004:127 |
Range (My) | |
Range (My) |
Tyrannosaurus rex, Albertosaurus sarcophagus |
Range (My) |
Definitional History #5 | |
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Latest Record | |
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Definitional History #6 | |
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Definitional History #7 | |
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Definitional History #8 | |
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Latest Record | |
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Definitional History #9 | |
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Latest Record | |
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Definitional History #10 | |
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