PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Hesperornithomorphi (disused)

Reptilia - Hesperornithomorphi

Taxonomy

Hesperornithomorphi was named by Hay (1930).

It was assigned to Eurhipidurae by Hay (1930).

Subtaxa

Dromaeopappi

Sister taxa

Dromaeopappi

Synonyms

Odontolcae was named by Marsh (1875). It is not extant.

It was reranked as the suborder Odontolcae by Zittel (1890); it was reranked as the unranked clade Odontolcae by Gadow (1898); it was reranked as the superorder Odontolcae by Hay (1902); it was synonymized subjectively with Hesperornithomorphi by Hay (1930).

It was assigned to Odontornithes by Marsh (1875) and Marsh (1880); to Ratitae by Zittel (1890); to Eurhipidura by Hay (1902); and to Neornithes by Gadow (1898) and Jaekel (1911).

Synonymy list

Year	Name and author
1875	Odontolcae Marsh p. 407
1880	Odontolcae Marsh p. 5
1890	Odontolcae Zittel p. 826
1898	Odontolcae Gadow p. 31
1902	Odontolcae Hay p. 520
1911	Odontolcae Jaekel p. 174
1930	Hesperornithomorphi Hay p. 277

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()

Rank	Name	Author
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Theropoda	()
—	Neotheropoda
—	Averostra	Paul 2002
—	Tetanurae
—	Coelurosauria	()
—	Maniraptora
—	Paraves
class	Aves
superorder	Eurhipidurae	(Gill 1874)
order	Hesperornithomorphi
order	Hesperornithomorphi

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Or. †Hesperornithomorphi Hay 1930

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Invalid names: Odontolcae Marsh 1875 [synonym]

Diagnosis

Reference	Diagnosis
K. A. v. Zittel 1890 (Odontolcae)	Oberkiefer und Unterkiefer mit Zähnen, welche in einer gemeinsamen Rinne stehen. Flügel rudimentär; Vorderarm, Metacarpalia und Hand völlig verkümmert; Hinterbeine sehr kräftig, mit Schwimmfüssen.