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Clade
Subclade

Taxon
Taxon
Oviraptorosauria
Nominal Author
Barsbold 1976a
2nd Nominal Author
Taxon Status ACTIVE
Comments

Currie and Padian (1997) and Padian et al. (1997) were first to define Oviraptorosauria. They chose a stem-based definition realizing that doing so might circumscribe taxa not normally included within Oviraptorosauria such as therizinosaurs. To avoid this possibility, Padian et al. (1999) switched to a less inclusive node-based definition. Later workers have not followed this revision. They returned to the earlier stem-based definition (Maryanska et al. 2002) or simply included newly discovered basal forms (Caudipteryx, Incisivosaurus) while excluding therizinosauroids (e.g. Xu et al. 2002).

The active definition of Oviraptorosauria is a first-order revision of the original stem-based definition that uses multiple external specifiers to stabilize taxonomic content. Recourse to a node-based definition to maintain stability of taxonomic content is unnecessary and counterproductive. A new stem-based taxon Oviraptoriformes Sereno 2005 has been introduced to include clades that lie just outside Oviraptorosauria.  If there are no such clades, then Oviraptoriformes overlaps in definitional type and content with Oviraptorosauria, which would have priority.

It should be noted that when Ornithomimosauria, Oviraptorosauria, and Deinocheirosauria were first coined by Barsbold (1976), he appended “Barsbold 1974” to the new taxa.  His bibliography, however, did not include any publication of this date naming these taxa.  Later (Barsbold 1983) corrected the date of these taxa to his 1976 publication.

Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Oviraptor philoceratops Osborn 1924 but not Therizinosaurus cheloniformis Maleev 1954, Ornithomimus edmontonicus Sternberg 1933, Troodon formosus Leidy 1856, Tyrannosaurus rex Osborn 1905, Passer domesticus (Linnaeus 1758).
Shorthand
> Oviraptor philoceratops but not Therizinosaurus cheloniformis, Ornithomimus edmontonicus, Troodon formosus, Tyrannosaurus rex, Passer domesticus
Definitional Author
Sereno 2005
Definition Status checked
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Oviraptor philoceratops
Specifier(s) B
Specifier(s) C
Therizinosaurus cheloniformis, Ornithomimus edmontonicus, Troodon formosus, Tyrannosaurus rex,
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
1997

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
Oviraptoridae and all taxa closer to Oviraptor than to birds.
Latest Record
Currie and Padian 1997:508
Range (My)
Range (My)
Oviraptor, birds
Range (My)

Definitional History #2
Earliest Record
All taxa closer to Oviraptor than to Aves.
Latest Record
Padian et al. 1997:68A
Range (My)
Range (My)
Oviraptor, Aves
Range (My)

Definitional History #3
Earliest Record
All maniraptorans closer to Oviraptor than to Neornithes.
Latest Record
Sereno 1998:65
Range (My)
Range (My)
Oviraptor, Neornithes
Range (My)

Definitional History #4
Earliest Record
Oviraptor and Chirostenotes (= Caenagnathus) and all descendants of their most recent common ancestor.
Latest Record
Padian et al. 1999:74
Range (My)
Range (My)
Oviraptor, Chirostenotes
Range (My)

Definitional History #5
Earliest Record
The most-inclusive clade containing Oviraptor philoceratops but not Passer domesticus.
Latest Record
Maryanska et al. 2002:103
Range (My)
Range (My)
Oviraptor philoceratops, Passer domesticus
Range (My)

Definitional History #6
Earliest Record
All maniraptorans closer to Oviraptor philoceratops than to Passer domesticus.
Latest Record
Osmlska et al. 2004:165
Range (My)
Range (My)
Oviraptor philoceratops, Passer domesticus
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)