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Diplacodon ✝

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Description

Diplacodon is a genus of prehistoric odd-toed ungulates in the family Brontotheriidae. A new species, D. gigan, was described by Matthew C. Mihlbachler in 2011, from the United States.

From Wikipedia article at https://en.wikipedia.org/wiki/Diplacodon, which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	4830408	https://www.gbif.org/species/4830408
PaleoBioDB ID (PBDB)	45799	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=45799

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Chordata : Mammalia : Perissodactyla : Brontotheriidae : Diplacodon

Taxonomy (PBDB)

Life : Animalia : Chordata : Mammalia : Perissodactyla : Brontotheriidae : Diplacodon

Taxonomic Status (GBIF)

accepted

Classification
(PBDB,GBIF)

Rank	Name	Author
-	Eukaryota
-	Opisthokonta	Cavalier-Smith 1987
kingdom	Animalia
-	Triploblastica	Lankester 1877
-	Nephrozoa	Jondelius et al. 2002
-	Deuterostomia	Grobben 1908
phylum	Chordata	Haeckel 1847
subphylum	Vertebrata	Lamarck 1801
superclass	Gnathostomata	Gegenbauer 1874
-	Osteichthyes
-	Sarcopterygii	Romer 1955
subclass	Dipnotetrapodomorpha
subclass	Tetrapodomorpha
-	Tetrapoda
-	Reptiliomorpha	Säve-Söderbergh 1934
-	Anthracosauria	Säve-Söderbergh 1934
-	Batrachosauria
-	Cotylosauria
-	Amniota	Haeckel 1866
-	Synapsida	Osborn 1903
-	Therapsida
infraorder	Cynodontia
-	Epicynodontia	Hopson and Kitching 2001
infraorder	Eucynodontia	Kemp 1982
-	Probainognathia	Hopson 1990
-	Mammaliamorpha	Rowe 1988
-	Mammaliaformes	Rowe 1988
class	Mammalia	Linnaeus 1758
subclass	Tribosphenida
infraclass	Eutheria
-	Placentalia	Owen 1837
order	Perissodactyla
family	Brontotheriidae
subfamily	Brontotheriinae	Marsh 1873
tribe	Brontotheriini	Marsh 1873
subtribe	Brontotheriina	Marsh 1873
genus	Diplacodon	Marsh 1875

Scientific Name

Diplacodon Marsh, 1875

Name Published In

Amer. J. Sci., (3) 9

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Diplacodon	genus	belongs to Menodontidae	stated without evidence	Cope, 1881
Diplacodon	genus	belongs to Lambdotheriinae	stated without evidence	Hay, 1902
Diplacodon	genus	belongs to Diplacodontinae	stated with evidence	Osborn, 1908
Diplacodon	genus	belongs to Brontotheridae	stated without evidence	Prothero and Schoch, 1989
Diplacodon	genus	nomen dubium Brontotheriinae	stated with evidence	Mader, 2000
Diplacodon	genus	belongs to Brontotheriina	stated with evidence	Mihlbachler, 2008

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

46.2 - 40.4 Ma
Eocene

Last Recorded Appearance

41.3 - 37.2 Ma
Eocene

Environment

terrestrial (based on Eutheria)

Motility

actively mobile (based on Osteichthyes)

Diet

browser (based on Brontotheriidae)

Taphonomy

phosphatic (based on Vertebrata)

Primary Reference (PBDB)

O. C. Marsh. 1875. Notice of new Tertiary mammals, IV. American Journal of Science 9(51):239-250

Wikipedia

https://en.wikipedia.org/wiki/Diplacodon

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Diplacodon elatus ✝ species	accepted (GBIF) listed (PBDB)	2	46.2 Ma Eocene	46.2 Ma Eocene
Diplacodon emarginatus ✝ species	listed (PBDB)	1	46.2 Ma Eocene	46.2 Ma Eocene
Diplacodon emarginatus ✝ species	accepted (GBIF) listed (PBDB)	3	46.2 Ma Eocene	46.2 Ma Eocene
Diplacodon gigan ✝ species	accepted (GBIF) listed (PBDB)

Synonymy List

Year	Name and Author
1875	Diplacodon Marsh p. 246
1881	Diplacodon Cope p. 397
1902	Diplacodon Hay p. 632
1908	Diplacodon Osborn p. 403
1914	Eotitanotherium Peterson
1914	Diploceras Peterson p. 29
1914	Eotitanotherium Peterson p. 220
1988	Eotitanotherium Carroll

Year	Name and Author
1989	Eotitanotherium Mader
1989	Diplacodon Prothero and Schoch p. 537
1989	Eotitanotherium Prothero and Schoch p. 537
2000	Pseudodiplacodon Mader
2008	Eotitanotherium Mader
2008	Pseudodiplacodon Mader
2008	Diplacodon Mihlbachler p. 413
2011	Diplacodon Mihlbachler

References

Marsh O. C. Notice of new Tertiary mammals, IV, American Journal of Science 9 51, 239-250 doi:10.2475/ajs.s3-9.51.239

Cope E. D. The systematic arrangement of the Order Perissodactyla, Proceedings of the American Philosophical Society 19 108, 377-401

Hay O. P. (1902) , Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey 179, 1-868

Osborn H. F. (1908) New or little known titanotheres from the Eocene and Oligocene, Bulletin of the American Museum of Natural History 24 32, 599-617

Peterson O. A. (1914) A new titanothere from the Uinta Eocene, Annals of Carnegie Museum 9 2, 29-52

Carroll R. L. (1988) , Vertebrate Paleontology and Evolution, 1-698

Mader B. J. (1989) The Brontotheriidae: A Systematic Revision and Preliminary Phylogeny of North American Genera, The Evolution of Perissodactyls

Prothero D. R., Schoch R. M. (1989) Classification of the Perissodactyla, The Evolution of Perissodactyla, 530-537

Mader B. J. (2008) A species level revision of Bridgerian and Uintan brontotheres (Mammalia, Perissodactyla) exclusive of Palaeosyops, Zootaxa 1837, 1-85

Mihlbachler M. C. (2008) Species taxonomy, phylogeny, and biogeography of the Brontotheriidae (Mammalia: Perissodactyla), Bulletin of the American Museum of Natural History 311 1, 1-475 doi:10.1206/0003-0090(2008)501

Mihlbachler M. C. (2011) A new uintan horned brontothere from Wyoming and the evolution of canine size and sexual dimorphism in the Brontotheriidae (Perissodactyla: Mammalia), Journal of Vertebrate Paleontology 31 1, 202-214 doi:10.1080/02724634.2011.539653

Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera

as per family - via The Interim Register of Marine and Nonmarine Genera

Amer. J. Sci., (3) 9 - via The Interim Register of Marine and Nonmarine Genera

GBIF/Yale University Peabody Museum: Peabody Paleoportal DiGIR Service (VP) - via The Interim Register of Marine and Nonmarine Genera

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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