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Clade
Subclade

Taxon
Taxon
Ornithuromorpha
Nominal Author
Chiappe et al. 1999
2nd Nominal Author
Taxon Status INACTIVE
Comments
Potential Synonomy
Ornithothoraces

Active Phylogenetic Definition
Active Definition
Shorthand
Definitional Author
Definition Status Unknown
Definition Type Unknown
Node-Stem Triplet Unknown
Other Triplet Taxa
Specifiers
Specifier(s) A
Specifier(s) B
Specifier(s) C
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown

Inactive Taxon Status
Rejection Criteria other
Critique

Chiappe et al. (1999:3) coined Ornithuromorpha in the abstract of a monograph on Confuciusornis; he neither discussed it further in the text nor proposed a definition. Chiappe (2001:126) provided a node-based definition using Patagopteryx, Vorona, and Ornithurae as specifiers. Because he regarded all of these taxa as closer to Neornithes than to Enantiornithes, this new taxon has the same taxonomic content as Euornithes. Ornithuromorpha, nevertheless, is not a junior synonym of Euornithes, because the former is node-based and the latter stem-based. More recently Chiappe (2002:457) dropped Vorona from the definition presumably because the incompletely known Vorona is positioned by some within Enantiornithes.

The current utility of Ornithuromorpha is questionable. If Vorona is placed within Enantiornithes, then Ornithuromorpha would constitute a junior synonym of Ornithothoraces.

 

Definitional History #1
Earliest Record
The common ancestor of Patagopteryx, Vorona and Ornithurae, and all descendants from this ancestor.
Latest Record
Chiappe 2001:126
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Patagopteryx, Vorona, Ornithurae
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Definitional History #2
Earliest Record
The common ancestor of Patagopteryx and Ornithurae plus all its descendants.
Latest Record
Chiappe 2002:457
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Patagopteryx, Ornithurae
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