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Systemodon

Mammalia - Perissodactyla

Taxonomy
Systemodon was named by Cope (1881).

It was synonymized subjectively with Hyracotherium by Hay (1899), Granger (1908), Troxell (1922), Wood (1934), Toohey (1959) and Radinsky (1963); it was synonymized subjectively with Eohippus by Hay (1902) and Peterson (1919); it was synonymized subjectively with Homogalax by Wood (1927) and Colbert and Schoch (1998).

It was assigned to Tapiridae by Scott (1913); to Equoidea by Prothero and Schoch (1989); to Isectolophidae by Cope (1881) and Froehlich (1999); and to Tapiromorpha by Froehlich (2002).

Synonymy list
YearName and author
1881Systemodon Cope
1913Systemodon Scott p. 291
1989Systemodon Prothero and Schoch p. 531
1999Systemodon Froehlich
2002Systemodon Froehlich pp. 183 - 185

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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
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
RankNameAuthor
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
—Tapiromorpha(Haeckel 1873)
genusSystemodon

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. †Systemodon Cope 1881
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†Systemodon tapirinus Cope 1875
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Invalid names: Hyracotherium cristatum Wortman 1896 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingsubo
Diet: browsersubo
Reproduction: viviparoussubc
Created: 2005-08-31 15:02:20
Modified: 2005-08-31 17:02:20
Source: subo = suborder, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Colbert and Schoch 1998, Hendy et al. 2009, Carroll 1988, Ji et al. 2002

Age range: base of the Graybullian to the top of the Wasatchian or 55.80000 to 50.30000 Ma

Collections (54 total)


Time interval Ma Country or state Original ID and collection number
Graybullian55.8 - 50.3USA (Wyoming) Hyracotherium cristatum (15701)
Wasatchian55.8 - 50.3USA (Wyoming) Hyracotherium cristatum (15692 15694 15695 15697 15702 15703 15704 15705 15706 15707 46682 46683 46692 46696 46699 46700 46701 46703 46704 46707 46711 46712 46714 46718 46729 46733 46734 46736 46740 46741 46742 46745 46746 46747 46748 46754 46755 46760 46761 46764 46767 46825 46826 46827 46847 46849) S. sp. (15542)
Wasatchian55.8 - 50.3USA (New Mexico) Hyracotherium tapirinum (15439 15441 15663)
Early/Lower Eocene55.8 - 48.6USA (Wyoming) Hyracotherium cristatum (15680 15684 15700)