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Clade
Subclade

Taxon
Taxon
Hesperornithes
Nominal Author
FŘrbringer 1888
2nd Nominal Author
Taxon Status ACTIVE
Comments
Fürbringer (1888) erected this taxon to include Hesperornis regalis and closely related forms. Clarke (2004:17) erected a stem-based definition using Hesperornis regalis and Aves as specifiers. The active definition uses Passer domesticus in place of Aves.
Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Hesperornis regalis Marsh 1872 but not Passer domesticus (Linnaeus 1758).
Shorthand
> Hesperornis regalis but not Passer domesticus.
Definitional Author
Sereno 2005
Definition Status checked
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Hesperornis regalis
Specifier(s) B
Specifier(s) C
Passer domesticus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2004

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
All taxa and/or specimens more closely related to Hesperornis regalis than to Aves.
Latest Record
Clarke 2004:17
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Hesperornis regalis, Aves
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