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Brachychampsa montana

Reptilia

Taxonomy
Brachychampsa montana was named by Gilmore (1911). Its type specimen is AMNH-DP 5032, a partial skull (anterior two-thirds of the skull with fragments of the posterior portion), and it is a 3D body fossil. Its type locality is Southeast of Lismas, which is in a Maastrichtian terrestrial horizon in the Hell Creek Formation of Montana.

Synonymy list
YearName and author
1911Brachychampsa montana Gilmore p. 298 figs. Pl. 26-27
1930Brachychampsa montana Hay p. 158
1964Brachychampsa montana Estes p. 142
1970Brachychampsa montana Estes and Berberian p. 6
1980Brachychampsa montana Carpenter and Lindsey p. 1213
1989Brachychampsa montana Bryant p. 54
1994Brachychampsa montana Norell et al. p. 4 figs. 1-6
1996Brachychampsa montana Williamson p. 422
2011Brachychampsa montana Puértolas et al.
2014Brachychampsa montana Carbot-Chanona p. 118

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
—Pseudosuchia(Zittel 1890)
—SuchiaKrebs 1974
—Paracrocodylomorpha
—Loricata(Merrem 1820)
—Crocodylomorpha()
—Solidocrania
suborderCrocodyliformes
—MesoeucrocodyliaWhetstone and Whybrow 1983
—NeosuchiaClark 1988
suborderEusuchiaHuxley 1875
—Crocodylia(Owen 1842)
—Alligatoroidea(Gray 1844)
—Globidonta
—Alligatoridae(Gray 1844)
—Caimaninae
genusBrachychampsa
speciesmontana

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.

†Brachychampsa montana Gilmore 1911
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Diagnosis
ReferenceDiagnosis
M. A. Norell et al. 1994Anterior end of rostrum very broad and blunt, narial aperture more than half as wide as rostrum, incisive foramen nearly half as wide as rostrum, suborbital fenestra smaller than in other alligatoroids, divided choana large, nearly excluding pterygoids from the ventral midline. Infratemporal fenestra large, nearly as large as orbit. Fifth maxillary tooth largest in the tooth row (reversal to the primitive condition for Crocodylia).