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Clade
Subclade

Taxon
Taxon
Ornithomimidae
Nominal Author
Marsh 1890
2nd Nominal Author
Taxon Status ACTIVE
Comments

Ornithomimidae was first defined by Sereno (1998) as a stem-based clade to circumscribe all commonly known genera, from Pelecanimimis to Ornithomimus. This taxonomic content corresponded with older usage and that of Galton and Smith (1990), when a family level taxon was used to circumscribe known genera. Earlier, Barsbold (1976) proposed a redundant taxon, Ornithomimosauria, to recognise the anatomical distinctiveness of the group, and eventually the name was adopted by most workers for the clade, with Ornithomimidae as one of three included families (Osmˇlska 1997).

Sereno (1998:65) defined Ornithomimidae as a stem-based taxon to include all of the genera, but mistakenly listed the therizinosaurid Erlikosaurus as an external specifier rather than an alvarezsaurid or suite of external specifiers. Here the family is defined to match current usage, which restricts the taxon to a subset of the clade (e.g. Osmˇlska 1997; Kobayashi and Lü 2003, Makovicky et al. 2004). The active definition is a first-order revision of the definition proposed by Sereno (1998), which uses several basal ornithomimosaurs as external specifiers.

Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Ornithomimus edmontonicus Sternberg 1933 but not Garudimimus brevipes Osmˇlska et al. 1972, Harpymimus okladnikovi Barsbold and Perle 1984, Shenzhousaurus orientalis Ji et al. 2003, Pelecanimimus polyodon Perez-Moreno et al. 1994.
Shorthand
> Ornithomimus edmontonicus but not Garudimimus brevipes, Harpymimus okladnikovi, Shenzhousaurus orientalis, Pelecanimimus polyodon.
Definitional Author
Sereno 2005
Definition Status TEXTUAL SUBSTITUTION
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Ornithomimus edmontonicus
Specifier(s) B
Specifier(s) C
Garudimimus brevipes, Harpymimus okladnikovi, Shenzhousaurus orientalis, Pelecanimimus polyodon
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2005

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
All ornithomimosaurs closer to Ornithomimus than to Erlikosaurus.
Latest Record
Sereno 1998:65
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Ornithomimus, Erlikosaurus
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