PBDB Taxon

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Colodon

Mammalia - Perissodactyla - Tapiridae

Taxonomy

Colodon was named by Marsh (1890).

It was assigned to Lophiodontidae by Hay (1902) and Scott (1913); to Perissodactyla by Matthew and Granger (1925); to Helaletinae by Radinsky (1966); to Tapiroidea by Marsh (1890), Prothero and Schoch (1989) and Colbert and Schoch (1998); to Helaletidae by Radinsky (1963), Bjork (1967) and Holbrook (1999); and to Tapiridae by Colbert (2005).

Species

C. cingulatus, C. copei, C. inceptus, C. kayi, C. occidentalis (syn. C. luxatus, C. procuspidatus, C. dakotensis, Mesohippus longipes), C. orientalis, C. stovalli, C. woodi

Species lacking formal opinion data

C. hodsimai

Synonyms

Mesotapirus was named by Scott and Osborn (1890) [Not sure of the author and date.].

It was synonymized subjectively with Colodon by Prothero and Schoch (1989).

Synonymy list

Year	Name and author
1890	Colodon Marsh
1890	Mesotapirus Scott and Osborn
1902	Colodon Hay p. 626
1913	Colodon Scott p. 291
1925	Colodon Matthew and Granger
1963	Colodon Radinsky p. 57
1966	Colodon Radinsky p. 633
1967	Colodon Bjork p. 232
1989	Colodon Prothero and Schoch p. 532
1998	Colodon Colbert and Schoch p. 576
1999	Colodon Holbrook p. 346
2005	Colodon Colbert p. 12

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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
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes

Rank	Name	Author
class	Mammalia
—	Theriamorpha	(Rowe 1993)
—	Theriiformes	()
—	Trechnotheria
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
—	Panperissodactyla
superorder	Perissodactylamorpha
order	Perissodactyla	()
—	Tapiromorpha	(Haeckel 1873)
—	Ceratomorpha	(Wood 1937)
superfamily	Tapiroidea	Gill 1872
family	Tapiridae	()
genus	Colodon

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.

G. †Colodon Marsh 1890

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†Colodon cingulatus Douglass 1902

†Colodon copei Osborn and Wortman 1895

†Colodon inceptus Matthew and Granger 1925

†Colodon kayi Hough 1955

†Colodon occidentalis Leidy 1868

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Invalid names: Colodon dakotensis Osborn and Wortman 1895 [synonym], Colodon luxatus Marsh 1890 [synonym], Colodon procuspidatus Osborn and Wortman 1895 [synonym], Mesohippus longipes Osborn and Wortman 1894 [synonym]

†Colodon orientalis Borissyak 1918

†Colodon stovalli Wilson and Schiebout 1984

†Colodon woodi Gazin 1956

Invalid names: Mesotapirus Scott and Osborn 1890 [synonym]

Diagnosis

Reference	Diagnosis
L. B. Radinsky 1963	Medium-sized to large helaletids with relatively short, wide cheek 1 a_ teeth. Canines small or absent. P with lingual loph or cusp; P * essentially molariform, protocone and hypocone more or less well separated, metaloph as prominent as prota- 12 loph and extending to hypocone. M " metacone flat to concave, more lingually displaced and shortened than in Helaletes. Pt absent. P2_4 with wide talonids and relatively large entoconids. Greatly enlarged nasal incisions with reduced nasals.