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Herpetotherium fugax

Mammalia

Taxonomy
Herpetotherium fuzax was named by Cope (1873) [genotype; originally spelt "fuzax"]. It is a 3D body fossil.

It was recombined as Peratherium fugax by Cope (1884), Hay (1930), Galbreath (1953), White (1954), Russell (1984) and Ostrander (1987); it was recombined as Didelphis fugax by Hay (1901) and Hay (1902); it was corrected as Herpetotherium fugax by Cope (1873), Korth (2018), Lofgren et al. (2020) and Korth et al. (2022).

Synonyms
Synonymy list
YearName and author
1873Herpetotherium fuzax Cope p. 1
1873Herpetotherium tricuspis Cope p. 5
1873Herpetotherium fugax Cope p. 6
1873Herpetotherium fuzax Cope p. 6
1873Herpetotherium scalare Cope p. 7
1884Peratherium fugax Cope
1884Peratherium scalare Cope
1884Peratherium tricuspis Cope
1884Didelphys pygmaea Scott
1894Didelphys pygmaea Scott
1901Didelphis fugax Hay
1901Didelphis pygmaea Hay
1901Didelphis scalare Hay
1901Didelphis tricuspis Hay
1902Didelphis fugax Hay p. 571
1902Didelphis pygmaea Hay p. 571
1902Didelphis scalaris Hay p. 571
1902Didelphis tricuspis Hay p. 571
1923Herpetotherium fuzax Troxell
1930Peratherium fugax Hay p. 393
1930Peratherium pygmaeum Hay p. 393
1930Peratherium scalare Hay p. 393
1930Peratherium tricuspis Hay p. 393
1953Peratherium fugax Galbreath
1954Peratherium fugax White p. 402
1961Herpetotherium fuzax Hough
1983Herpetotherium fuzax Krishtalka and Stucky
1984Peratherium fugax Russell
1987Peratherium fugax Ostrander
1992Herpetotherium fuzax Korth
1994Herpetotherium fuzax Korth
2007Herpetotherium fuzax Sánchez-Villagra et al. p. 318
2018Herpetotherium fugax Korth
2020Herpetotherium fugax Lofgren et al.
2022Herpetotherium fugax Korth et al.

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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
RankNameAuthor
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
subclassMetatheria()
—Marsupialiformes
—Marsupialia()
—Herpetotheriidae(Trouessart 1879)
genusHerpetotherium
speciesfugax()

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.

†Herpetotherium fugax Cope 1873
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Invalid names: Didelphys pygmaea Scott 1894 [synonym], Herpetotherium scalare Cope 1873 [synonym], Herpetotherium tricuspis Cope 1873 [synonym]
Diagnosis
ReferenceDiagnosis
E. D. Cope 1873Enamel smooth, no cinguluin on either side. Molars truncate behind. Outer anterior lobe acute, considerably the higher.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: omnivoref
Reproduction: viviparoussubc
Created: 2011-04-28 21:40:09
Modified: 2011-04-28 06:40:09
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Clemens 1979, Lillegraven 1979, Hendy et al. 2009, Sánchez-Villagra et al. 2007, Carroll 1988, Hopson 1973

Age range: base of the Chadronian to the top of the Geringian or 37.20000 to 26.30000 Ma

Collections (32 total)


Time interval Ma Country or state Original ID and collection number
Chadronian37.2 - 33.9USA (Montana) Herpetotherium fugax (16959 17010) Peratherium fugax (16988)
Chadronian37.2 - 33.9USA (Colorado) Peratherium fugax (16977)
Chadronian37.2 - 33.9USA (Nebraska) Peratherium fugax (16917 16930 16941 17014 17033)
Chadronian37.2 - 33.9USA (North Dakota) Herpetotherium fugax (16991)
Late/Upper Chadronian37.2 - 33.9Canada (Saskatchewan) Herpetotherium fugax (16981)
Late/Upper Chadronian - Orellan37.2 - 33.3USA (Nebraska) Herpetotherium fugax (230806)
Orellan33.9 - 33.3USA (Montana) Herpetotherium fugax (17090 17109 17138) Peratherium fugax (17074 17154)
Orellan33.9 - 33.3USA (Wyoming) Peratherium spindleri (17318)
Orellan33.9 - 33.3USA (South Dakota) Peratherium fugax (17097 17187 17189 17190)
Orellan33.9 - 33.3USA (Colorado) Peratherium fugax (17081 17082)
Orellan33.9 - 33.3Canada (Saskatchewan) Herpetotherium fugax (17111)
Orellan33.9 - 33.3USA (Nebraska) Herpetotherium fugax (17108)
Whitneyan33.3 - 30.8USA (South Dakota) Herpetotherium fugax (17336 17338)
Whitneyan33.3 - 30.8USA (Montana) Herpetotherium fugax (230863)
Whitneyan33.3 - 30.8USA (Colorado) Peratherium fugax (17426)
Geringian30.8 - 26.3USA (Nebraska) Marsupialia indet. (17709)
early Early Arikareean29.5 - 18.5USA (Nebraska) Herpetotherium fugax (156729)