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Mylohyus fossilis

Mammalia - Tayassuidae

Taxonomy
Dicotyles fossilis was named by Leidy (1860) [status unclear in light of Wright 1998]. Its type specimen is ANSP 11509, a set of teeth (five isolated teeth), and it is a 3D body fossil.

It was synonymized subjectively with Mylohyus nasutus by Kurten and Anderson (1980); it was recombined as Mylohyus fossilis by Lundelius (1960), Westgate and Messick (1985), Hulbert and Pratt (1998), Wright (1998), Albright et al. (2019), Prothero (2021).

Sister species lacking formal opinion data
M. lenis

Synonyms
Synonymy list
YearName and author
1860Dicotyles fossilis Leidy p. 108
1889Dicotyles pennsylvanicus Leidy
1899Mylohyus tetragonus Cope
1902Tayassu pennsylvanicus Hay p. 659
1902Tayassu tetragonus Hay p. 660
1914Mylohyus temerarius Hay
1920Mylohyus pennsylvanicus Gidley p. 674
1920Mylohyus browni Gidley p. 675
1920Mylohyus tetragonus Gidley p. 675
1920Mylohyus exortivus Gidley p. 676
1926Mylohyus pennsylvanicus Allen
1929Mylohyus gidleyi Simpson
1960Mylohyus fossilis Lundelius, Jr.
1985Mylohyus fossilis Westgate and Messick
1998Mylohyus fossilis Hulbert, Jr. and Pratt
1998Mylohyus fossilis Wright
2019Mylohyus fossilis Albright et al. p. 188
2021Mylohyus fossilis Prothero p. 49

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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
genusMylohyusCope 1869
speciesfossilis(Leidy 1860)

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.

†Mylohyus fossilis Leidy 1860
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Invalid names: Dicotyles pennsylvanicus Leidy 1889 [synonym], Mylohyus browni Gidley 1920 [synonym], Mylohyus exortivus Gidley 1920 [synonym], Mylohyus gidleyi Simpson 1929 [synonym], Mylohyus temerarius Hay 1914 [synonym], Mylohyus tetragonus Cope 1899 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserg
Diet 2: grazerg
Reproduction: viviparoussubc
Created: 2009-01-04 10:36:00
Modified: 2009-01-04 12:36:00
Source: g = genus, f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Hendy et al. 2009, Carroll 1988, Nowak 1999, Lillegraven 1979, MacFadden and Cerling 1996

Age range: base of the Irvingtonian to the top of the Rancholabrean or 1.40000 to 0.01400 Ma

Collections (27 total)


Time interval Ma Country or state Original ID and collection number
Pleistocene2.58 - 0.0117USA (South Carolina) Mylohyus fossilis (65405)
Pleistocene2.58 - 0.0117USA (Maryland) Mylohyus exortivus (126660)
Pleistocene2.58 - 0.0117USA (Tennessee) Mylohyus exortivus (74246)
Pleistocene2.58 - 0.0117USA (West Virginia) Mylohyus exortivus (79661) Mylohyus fossilis (108095)
Pleistocene2.58 - 0.0117USA (Florida) Mylohyus fossilis (227368)
Irvingtonian1.4 - 0.21USA (Pennsylvania) Mylohyus fossilis (20479) Mylohyus nasutus (20354)
Irvingtonian1.4 - 0.21USA (Arkansas) Mylohyus browni (20290)
Irvingtonian1.4 - 0.21USA (Alabama) Mylohyus nasutus (20281)
Irvingtonian1.4 - 0.21USA (Florida) Mylohyus nasutus (20400) Mylohyus sp. (20289 20478)
Irvingtonian1.4 - 0.21USA (Kansas) Mylohyus nasutus (20332 20390 20516)
Irvingtonian1.4 - 0.21USA (Maryland) Mylohyus exortivus, Mylohyus pennsylvanicus, Mylohyus nasutus (20302)
Rancholabrean0.21 - 0.014USA (South Carolina) Mylohyus fossilis (79757)
Rancholabrean0.21 - 0.014USA (Florida) Mylohyus fossilis (20491)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117USA (Alabama) Mylohyus nasutus (20584)
Late/Upper Pleistocene (glacial)0.129 - 0.0117USA (Florida) Mylohyus gidleyi, Mylohyus pennsylvanicus (154771)
Late/Upper Pleistocene0.129 - 0.0117USA (Virginia) Mylohyus fossilis (124089)
Late/Upper Pleistocene0.129 - 0.0117USA (Alabama) Mylohyus fossilis (84195)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117USA (Florida) Mylohyus fossilis (20572)
Late/Upper Pleistocene0.129 - 0.0117USA (Florida) Mylohyus pennsylvanicus (154773) Tayassu lenis (34269)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117USA (Georgia) Mylohyus fossilis (20604)