Clade | |
Subclade |
Taxon | |
Taxon |
Tyrannosauroidea
|
Nominal Author | Osborn 1906 |
2nd Nominal Author | Walker 1964 |
Taxon Status | ACTIVE |
Comments | Bonaparte et al. (1990) indicated their first used Tyrannosauroidea and were credited accordingly by Sereno (1998). Walker (1964), however, was first to use the superfamily in his classification that included the families Ornithosuchidae, Tyrannosauridae, and Spinosauridae. Tyrannosauroidea was first defined by Sereno (1998) as a stem-based definition to include all members of this increasingly diverse stem clade. Sereno (1998) only used Neornithes as an external specifier. Holtz (2004) use Ornithomimus velox, Deinonychus antirrhopus, and Allosaurus fragilis. The critical external specifiers are those that represent clades that could conceivable be related to tyrannosauroids, and these include ornithomimosaurs, troodontids, and dromaeosaurids. There is really no need to include Allosaurus or Passer as external specifiers, as no recent cladogram considers Aves or Allosauroidea close relatives of tyrannosauroids. The active definition is a first-order revision of both previous definitions (Sereno 1998, Holtz 2004). |
Potential Synonomy |
Active Phylogenetic Definition | |
Active Definition |
The most inclusive clade containing Tyrannosaurus rex Osborn 1905 but not Ornithomimus edmontonicus Sternberg 1933, Troodon formosus Leidy 1856, Velociraptor mongoliensis Osborn 192).
|
Shorthand |
> Tyrannosaurus rex but not Ornithomimus edmontonicus, Therizinosaurus cheloniformis,Shuvuuia deserti, Oviraptor philoceratops, Troodon form |
Definitional Author |
Sereno 2005 |
Definition Status | checked |
Definition Type | STEM |
Node-Stem Triplet | NO |
Other Triplet Taxa | |
Specifiers | |
Specifier(s) A |
Tyrannosaurus rex |
Specifier(s) B | |
Specifier(s) C |
Ornithomimus edmontonicus, Troodon formosus, Velociraptor mongoliensis
|
Qualifiers | |
+Taxon | |
-Taxon | |
Datum | |
Taxonomic Content | |
Publication Year |
Unknown Unknown Unknown 1998 |
Inactive Taxon Status | |
Rejection Criteria | |
Critique | |
Definitional History #1 | |
Earliest Record | All maniraptorans closer to Tyrannosaurus than to Neornithes. |
Latest Record | Sereno 1998:65 |
Range (My) | |
Range (My) |
Tyrannosaurus, Neornithes |
Range (My) |
Definitional History #2 | |
Earliest Record | Tyrannosaurus rex and all taxa sharing a more recent common ancestor with T. rex than with Ornithomimus velox, Deinonychus antirrhopus, or Allosaurus fragilis. |
Latest Record | Holtz 2004:114 |
Range (My) | |
Range (My) |
Tyrannosaurus rex, Ornithomimus velox, Deinonychus antirrhopus, Allosaurus fragilis. |
Range (My) |
Definitional History #3 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #4 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #5 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #6 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #7 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #8 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #9 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #10 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |