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Hesperhys

Mammalia - Tayassuidae

Synonyms
  • Pediohyus was named by Loomis (1910).

    It was synonymized subjectively with Desmathyus by Dalquest and Mooser (1980); it was synonymized subjectively with Hesperhys by McKenna and Bell (1997).
  • Pediohyus ferus was named by Loomis (1910) [genotype]. Its type locality is Raw Hide Buttes (Upper Harrison), which is in an Arikareean terrestrial horizon in Wyoming.

    It was recombined as Desmathyus ferus by Dalquest and Mooser (1980); it was recombined as Hesperhys ferus by McKenna and Bell (1997); it was considered a nomen dubium by Prothero (2015) and Prothero (2021).
Synonymy list
YearName and author
1903Hesperhys Douglass
1910Pediohyus Loomis
1910Pediohyus ferus Loomis
1980Desmathyus ferus Dalquest and Mooser
1988Hesperhys Carroll
1997Hesperhys ferus McKenna and Bell
1997Hesperhys McKenna and Bell p. 397
1998Hesperhys Wright p. 395
2015Hesperhys Prothero p. 237
2021Hesperhys Prothero p. 10

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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()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
superfamilySuoidea
—Suina(Gray 1868)
familyTayassuidae
subfamilyHesperhyinae
genusHesperhys

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. †Hesperhys Douglass 1903
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†Hesperhys antiquus Marsh 1870
†Hesperhys vagrans Douglass 1903
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Invalid names: Desmathyus validus Matthew 1932 [synonym]
Invalid names: Pediohyus Loomis 1910 [synonym]
Diagnosis
ReferenceDiagnosis
D. R. Prothero 2015Very large hesperhyine with very massive, robust skull and aring orbits and zygomatic arches, and broad rostrum; cheek teeth more robust and bulbous than in any other hesperhyine. The plesiochoanal fossa is reduced to a shallow pocket. P3 has a large protocone. The i1 and i2 are deep dorsoventrally at the base.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Diet 2: omnivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-23 13:10:33
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Nowak 1999, Hendy et al. 2009, Lillegraven 1979, Carroll 1988

Age range: base of the Aquitanian to the top of the Hemingfordian or 23.03000 to 15.97000 Ma

Collections (18 total)


Time interval Ma Country or state Original ID and collection number
Arikareean29.5 - 18.5USA (Wyoming) Pediohyus ferus (17822)
early Late Arikareean29.5 - 18.5USA (Oregon) H. sp. (170307)
Harrisonian24.8 - 18.5USA (Nebraska) H. sp. (28043)
Aquitanian23.03 - 20.44USA (California) H. sp. (19485)
Aquitanian23.03 - 20.44USA (Texas) H. sp. (18663)
Early/Lower Hemingfordian20.43 - 15.97USA (New Jersey) Perchoerus antiquus (17910)
Hemingfordian20.43 - 15.97USA (Nevada) Desmathyus validus (18962)
Hemingfordian20.43 - 15.97USA (Colorado) H. sp. (17965)
Hemingfordian20.43 - 15.97USA (Nebraska) Desmathyus validus (18001)
Barstovian16.3 - 12.5USA (Nevada) H. sp. (19103)
Barstovian16.3 - 12.5USA (California) H. sp. (19327) H. vagrans (19356 19565 19616)
Barstovian16.3 - 12.5USA (Montana) H. vagrans (18894)
Early/Lower Barstovian16.3 - 12.5USA (Nebraska) H. sp. (17955) H. vagrans (17905 17985)