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Dilophodon ✝

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Description

Tapiroidea is a superfamily of perissodactyls which includes the modern tapir. Members of the superfamily are small to large browsing mammals, roughly pig-like in shape, with short, prehensile snouts. Their closest relatives are the other odd-toed ungulates, including horses and rhinoceroses. Taxonomically, they are placed in suborder Ceratomorpha along with the rhino superfamily, Rhinocerotoidea. The first members of Tapiroidea appeared during the Early Eocene, 55 million years ago.

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

Source Data

Source	ID	Link
Global Biodiversity Information Facility ID (GBIF)	4830316	https://www.gbif.org/species/4830316
PaleoBioDB ID (PBDB)	43093	https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=43093

Rank

genus

Taxonomy (GBIF)

Life : Animalia : Chordata : Mammalia : Perissodactyla : Hyrachyidae : Dilophodon

Taxonomy (PBDB)

Life : Animalia : Chordata : Mammalia : Perissodactyla : Tapiridae : Dilophodon

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
-	Tapiromorpha
-	Ceratomorpha
superfamily	Tapiroidea	Gill 1872
family	Tapiridae	Gray 1821
genus	Dilophodon	Scott 1883

Scientific Name

Dilophodon Scott, 1883

Name Published In

Contr. Mus. Princeton Bull., 3

Opinions (PBDB)

Name	Rank	Opinion	Evidence	Author
Dilophodon	genus	belongs to Ceratomorpha	stated with evidence	Scott, 1883
Dilophodon	genus	belongs to Lophiodontidae	stated without evidence	Scott, 1883
Dilophodon	genus	subjective synonym of Helaletes	stated with evidence	Osborn, 1889
Dilophodon	genus	subjective synonym of Helaletes	stated without evidence	Matthew, 1899
Dilophodon	genus	belongs to Ceratomorpha	stated without evidence	Matthew, 1909
Dilophodon	genus	belongs to Ceratomorpha	stated with evidence	Peterson, 1919
Dilophodon	genus	belongs to Ceratomorpha	stated without evidence	Troxell, 1922
Dilophodon	genus	belongs to Helaletidae	stated without evidence	Hough, 1955
Dilophodon	genus	belongs to Helaletidae	stated with evidence	Radinsky, 1963
Dilophodon	genus	belongs to Helaletinae	stated with evidence	Radinsky, 1966
Dilophodon	genus	belongs to Ceratomorpha	stated without evidence	Prothero and Schoch, 1989
Dilophodon	genus	belongs to Tapiroidea	stated without evidence	Prothero and Schoch, 1989
Dilophodon	genus	belongs to Ceratomorpha	stated with evidence	Colbert and Schoch, 1998
Dilophodon	genus	belongs to Tapiridae	stated with evidence	Colbert, 2005

Status (PBDB)

extinct

Taxon Size (PBDB)

First Recorded Appearance

50.3 - 46.2 Ma
Eocene

Last Recorded Appearance

46.2 - 40.4 Ma
Eocene

Environment

terrestrial (based on Eutheria)

Motility

actively mobile (based on Osteichthyes)

Diet

browser (based on Tapiridae)

Taphonomy

phosphatic (based on Vertebrata)

Primary Reference (PBDB)

W. B. Scott. 1883. Two new Eocene lophiodonts. Contributions from the E. M. Museum of Geology and Archeology of Princeton College 3(4):46-53

Wikipedia

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

Fossil Distribution

Subtaxa

Name	Status	Fossil Occurrences	Oldest	Youngest
Dilophodon destitutus ✝ species	accepted (GBIF) listed (PBDB)	1	50.3 Ma Eocene	50.3 Ma Eocene
Dilophodon minusculus ✝ species	accepted (GBIF) listed (PBDB)	2	46.2 Ma Eocene	46.2 Ma Eocene
Hyrachyus nanus ✝ species	accepted (GBIF) listed (PBDB)	2	50.3 Ma Eocene	50.3 Ma Eocene

Synonymy List

Year	Name and Author
1883	Dilophodon Scott
1909	Dilophodon Matthew
1919	Dilophodon Peterson p. 113
1922	Dilophodon Troxell
1955	Dilophodon Hough p. 29
1963	Dilophodon Radinsky p. 51

Year	Name and Author
1966	Dilophodon Radinsky p. 633
1989	Dilophodon Prothero and Schoch p. 534
1989	Dilophodon Schoch
1998	Dilophodon Colbert and Schoch p. 574
2005	Dilophodon Colbert p. 12

References

Scott W. B. Two new Eocene lophiodonts, Contributions from the E. M. Museum of Geology and Archeology of Princeton College 3 4, 46-53

Matthew W. D. (1909) The Carnivora and Insectivora of the Bridger Basin, middle Eocene, Memoirs of the American Museum of Natural History 9, 289-567

Peterson O. A. (1919) Report Upon the Material Discovered in the Upper Eocene of the Uinta Basin by Earl Douglas in the Years 1908-1909, and by O. A. Peterson in 1912, Annals of Carnegie Museum 12 2, 40-168

Troxell E. L. (1922) Helaletes redefined, American Journal of Science 3 17, 365-370 doi:10.2475/ajs.s5-3.17.365

Hough J. (1955) An Upper Eocene Fauna from the Sage Creek Area, Beaverhead County, Montana, Journal of Paleontology 29 1, 22-36

Radinsky L. B. (1963) Origin and Early Evolution of North American Tapiroidea, Peabody Museum of Natural History Bulletin 17, 1-118

Radinsky L. B. (1966) The families of the Rhinocerotoidea (Mammalia, Perissodactyla), Journal of Mammalogy 47 4, 631-639

Prothero D. R., Schoch R. M. (1989) Origin and evolution of the Perissodactyla: Summary and Synthesis, The Evolution of Perissodactyls, 530-529

Schoch R. M. (1989) A Review of the Tapiroids, The Evolution of Perissodactyls

Colbert M. W., Schoch R. M. (1998) Tapiroidea and other moropomorphs, Evolution of Tertiary mammals of North America, 569-582

Colbert M. W. (2005) The facial skeleton of the early Oligocene Colodon (Perissodactyla, Tapiroidea), Palaeontologia Electronica 8 1, 1-27

Contr. Mus. Princeton Bull., 3 - via The Interim Register of Marine and Nonmarine Genera

Museum Victoria KEmu database (Oct 2006) - via The Interim Register of Marine and Nonmarine Genera

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

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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