Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Hesperhyinae

Mammalia - Tayassuidae

Synonymy list
YearName and author
2015Hesperhyinae Prothero p. 235
2021Hesperhyinae Prothero p. 9

Is something missing? Join the Paleobiology Database and enter the data

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
—Mammaliaformes
RankNameAuthor
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
superfamilySuoidea
—Suina(Gray 1868)
familyTayassuidae
subfamilyHesperhyinae
subfamilyHesperhyinae

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.

Subfm. †Hesperhyinae Prothero 2015
show all | hide all
G. †Desmathyus Matthew 1907
hide
†Desmathyus pinensis Matthew 1907
G. †Floridachoerus White 1941
hide
†Floridachoerus olseni White 1941
G. †Fremdohyus Prothero 2016
hide
†Fremdohyus osmonti Sinclair 1905
G. †Hesperhys Douglass 1903
hide
†Hesperhys antiquus Marsh 1870
†Hesperhys vagrans Douglass 1903
+
Invalid names: Desmathyus validus Matthew 1932 [synonym]
Invalid names: Pediohyus Loomis 1910 [synonym]
G. †Lucashyus Prothero 2015
hide
†Lucashyus coombsae Prothero 2015
G. †Marshochoerus Prothero 2015
hide
†Marshochoerus socialis Marsh 1875
G. †Stuckyhyus Prothero 2015
hide
†Stuckyhyus siouxensis Peterson 1906
G. †Wrightohyus Prothero 2015
hide
†Wrightohyus yatkolai Prothero 2015
Diagnosis
ReferenceDiagnosis
D. R. Prothero 2015As Wright (1991) discovered, the hesperhyines have a distinctive morphology in their nasal-choanal region (Fig. 2). Instead of the simple broad arcuate choanal margin of most mammals (Fig. 2A), the pterygoids fuse together and push the active choanal opening posteriorly to form a “neochoanal chamber”. The anterior choanal opening thus is left behind as the “plesiochoanal fossa” or “plesiochoanal chamber”. All hesperhyine fossils that adequately preserve this region have this unique plesiochoanal chamber, medially fused pterygoid bones, large pterygoid processes on the alisphenoid, and vertical processes on the palatine bones (see Wright, 1991, 1998).
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: Lillegraven 1979, Nowak 1991, Nowak 1999, Carroll 1988, Hendy et al. 2009

Age range: base of the Harrisonian to the top of the Messinian or 24.80000 to 5.33300 Ma

Collections (40 total)


Time interval Ma Country or state Original ID and collection number
Arikareean29.5 - 18.5USA (Wyoming) Pediohyus ferus (17822)
Arikareean29.5 - 18.5USA (Oregon) Fremdohyus osmonti (189088) Palaeochoerus socialis (180202) Thinohyus osmonti (189087)
early Late Arikareean29.5 - 18.5USA (Oregon) Hesperhys sp. (170307)
late Late Arikareean29.5 - 18.5USA (Oregon) Cynorca sociale (18013)
Chattian28.1 - 23.03USA (California) Desmathyus sp. (11601)
Harrisonian24.8 - 18.5USA (Wyoming) Lucashyus coombsae (17854) Wrightohyus yatkolai (17839)
Harrisonian24.8 - 18.5USA (Nebraska) Hesperhys sp. (28043) Thinohyus siouxensis (17741)
Harrisonian24.8 - 18.5USA (South Dakota) Desmathyus pinensis (17745 17747 17748 17831)
Aquitanian23.03 - 20.44USA (Texas) Hesperhys sp., Cynorca sociale, Hesperhys pinensis (18663)
Aquitanian23.03 - 20.44USA (California) Hesperhys sp. (19485)
Burdigalian20.44 - 15.97USA (Delaware) Cynorca sociale (18579)
Early/Lower Hemingfordian20.43 - 15.97USA (Nebraska) Wrightohyus yatkolai (17891)
Early/Lower Hemingfordian20.43 - 15.97USA (New Jersey) Perchoerus antiquus (17910)
Hemingfordian20.43 - 15.97USA (Colorado) Hesperhys sp. (17965)
Hemingfordian20.43 - 15.97USA (Florida) Floridachoerus olseni (18597)
Hemingfordian20.43 - 15.97USA (Texas) Tayassuidae indet. (18626)
Hemingfordian20.43 - 15.97USA (South Dakota) Desmathyus pinensis (17912)
Hemingfordian20.43 - 15.97USA (Nebraska) Desmathyus validus (18001)
Hemingfordian20.43 - 15.97USA (Nevada) Cynorca sociale, Desmathyus pinensis, Desmathyus validus (18962) Desmathyus pinensis (18961)
Hemingfordian - Barstovian20.43 - 12.5USA (California) Cynorca sociale (19478)
Barstovian16.3 - 12.5USA (Nevada) Hesperhys sp. (19103)
Barstovian16.3 - 12.5USA (Montana) Hesperhys vagrans (18894)
Barstovian16.3 - 12.5USA (California) Hesperhys sp. (19327) Hesperhys vagrans (19356 19565 19616)
Early/Lower Barstovian16.3 - 12.5USA (Nebraska) Hesperhys sp. (17955) Hesperhys vagrans (17905 17985)
Langhian15.97 - 13.82USA (Maryland) Desmathyus sp. (48884)
Serravallian13.82 - 11.62USA (Maryland) Hesperhys sp. (13408)
Messinian7.246 - 5.333USA (Virginia) Desmathyus sp. (179732)