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Clade
Subclade
Archosauria: Avemetatarsalia to Neornithes
Taxon
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Taxon
Alexornithiformes
Nominal Author
Brodkorb 1978
2° Nominal Author
Taxon Status
active
inactive
Comments
Potential Synonomy
Active Phylogenetic Definition
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Active Definition
Shorthand
Definitional Author
Definition Status
original
textual substitution
first-order revision
second-order revision
Definition Type
node
stem
Node-Stem Triplet
yes
no
Other Triplet Taxa
Specifiers
Specifier A
Specifier(s) B
Specifier(s) C
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
stem (entirely extinct)
crown (extant-bounded)
mixed (extant/extinct-bounded)
Publication Year
Inactive Taxon Status
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Rejection Criteria
junior synonym
historically polyphyletic
incomplete definition
no definition
apomorphy-based
redundant
other
Critique
No definition has been proposed, and the taxon is redundant with Alexornithidae. Alexornithiformes recently has been shown to encompass 13 genera (Kurochkin 1996), although there is no cladistic support for suh a clade (Sereno et al. 2002).
Current Age Range
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Earliest Record
Latest Record
Range (My)
Basis for Range
Additional Definitional History:
None Available
