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Clade
Subclade

Taxon
Taxon
Oviraptoriformes
Nominal Author
Sereno 2005
2nd Nominal Author
Taxon Status ACTIVE
Comments

A new stem-based taxon, Oviraptoriformes, is introduced to accommodate clades most closely related to Oviraptorosauria. If there are none, then Oviraptoriformes overlaps in definitional type and content with Oviraptorosauria, which would have priority.

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 and either 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. The previous node-based revision is unnecessary for the maintenance of taxonomic stability. The new taxon Oviraptoriformes has been introduced to accommodate clades outside Oviraptorosauria in parallel to the situation described herein for Onithomimiformes and Ornithomimosauria.

Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Oviraptor philoceratops Osborn 1924 but not Passer domesticus (Linnaeus 1758).
Shorthand
> Oviraptor philoceratops but not Passer domesticus.
Definitional Author
Sereno 2005
Definition Status ORIGINAL
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Oviraptor philoceratops
Specifier(s) B
Specifier(s) C
Passer domesticus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2005

Inactive Taxon Status
Rejection Criteria
Critique
 

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