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Diplacodon elatus

Mammalia - Perissodactyla - Brontotheriidae

Taxonomy
Diplacodon elatus was named by Marsh (1875) [genotype]. Its type specimen is YPM 11180, a skull, and it is a 3D body fossil. It is the type species of Diplacodon.

It was considered a nomen dubium by Mader (2000).

Synonyms
Synonymy list
YearName and author
1875Diplacodon elatus Marsh p. 246
1913Diploceras osborni Peterson
1914Eotitanotherium osborni Peterson
1929Eotitanotherium osborni Osborn
1934Diplacodon progressum Peterson
1983Diplacodon osborni Lucas
1989Eotitanotherium osborni Mader
2000Eotitanotherium osborni Mader
2000Pseudodiplacodon progressum Mader
2008Eotitanotherium osborni Mader
2008Pseudodiplacodon progressum Mader p. 8
2008Diplacodon elatus Mihlbachler p. 413
2011Diplacodon elatus Mihlbachler

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
orderPerissodactyla()
familyBrontotheriidae()
subfamilyBrontotheriinaeMarsh 1873
tribeBrontotheriiniMarsh 1873
subtribeBrontotheriinaMarsh 1873
genusDiplacodon
specieselatus

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.

Diagnosis
ReferenceDiagnosis
B. J. Mader 2008 (Eotitanotherium osborni)Large-sized (length P2 to M3 approximately 221–236 mm) diplacodont brontothere with
short, angular horns that are elliptical in cross-section; gracile nasals that are distally rounded and down- turned; and two well separated lingual cusps on P4. In general, the length of the cheek tooth series is longer than in most specimens of Pseudodiplacodon, but the skull is smaller in size.