Clade | |
Subclade |
Taxon | |
Taxon |
Hesperornithidae
|
Nominal Author | Marsh 1872 |
2nd Nominal Author | |
Taxon Status | ACTIVE |
Comments | Hesperornithidae (originally spelled Hesperornidae, Marsh 1872:4) was defined by Clarke (2004:18) as a stem-based taxon that includes the type species Hesperornis regalis and other species more closely related to H. regalis than to Baptornis advenus. This follows Martin (1983, 1984), who recognized a second genus (Parahesperornis) most closely related to Hesperornis. This is somewhat arbitrary, as Martin might well have just recognized another species of Hesperornis. Previously Hesperornithidae has been redundant with the genus Hesperornis. |
Potential Synonomy | Hesperornidae (Marsh 1872, spelling variant), Hesperornithiformes, Hesperornithinae |
Active Phylogenetic Definition | |
Active Definition |
The most inclusive clade containing Hesperonris regalis Marsh 1872 but not Baptornis advenus Marsh 1877.
|
Shorthand |
> Hesperonris regalis but not Baptornis advenus. |
Definitional Author |
Clarke 2004 |
Definition Status | TEXTUAL SUBSTITUTION |
Definition Type | STEM |
Node-Stem Triplet | NO |
Other Triplet Taxa | |
Specifiers | |
Specifier(s) A |
Hesperonris regalis |
Specifier(s) B | |
Specifier(s) C |
Baptornis advenus
|
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 more closely related to Hesperornis regalis (Marsh 1872a) than to Baptornis advenus (Marsh 1877a). |
Latest Record | Clarke 2004:18 |
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Hesperornis regalis, Baptornis advenus |
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