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Eporeodon thurstoni

Mammalia - Ungulata - Merycoidodontidae

Taxonomy
Eporeodon thurstoni was named by Stock (1934). Its type specimen is CIT 1566, a skeleton (partial skull and most of skeleton), and it is a 3D body fossil. Its type locality is South Mountain (CIT 157), which is in an Arikareean terrestrial horizon in the Sespe Formation of California.

It was recombined as Desmatochoerus (Paradesmatochoerus) thurstoni by Schultz and Falkenbach (1954); it was synonymized subjectively with Merycoides pariogonus by Lander (1983); it was recombined as Desmatochoerus thurstoni by Mason and Swisher (1989); it was synonymized subjectively with Merycoides relictus by Lander (1998).

Synonymy list
YearName and author
1934Eporeodon thurstoni Stock
1937Eporeodon thurstoni Thorpe p. 96 figs. PI. XLIII, fig. 1
1954Desmatochoerus (Paradesmatochoerus) thurstoni Schultz and Falkenbach p. 202
1960Eporeodon thurstoni Stirton p. 363
1989Desmatochoerus thurstoni Mason and Swisher
2007Eporeodon thurstoni Stevens and Stevens p. 160

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
RankNameAuthor
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
orderUngulata(Linnaeus 1766)
orderArtiodactyla()
familyMerycoidodontidae
subfamilyEporeodontinae
genusEporeodon
speciesthurstoni

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.

Diagnosis
ReferenceDiagnosis
M. R. Thorpe 1937This species approaches E. socialis in size but is somewhat smaller. There is an antorbital pit, and the bulla; are large. The orbit is decidedly large. The skull lacks the greater portion of the cranium, so that it is unwise to diagnose the skull characters until more comparable material is brought to light.
Skeleton: Stock records the fact that the right pes has a rudimentary element articulated with the navicular and situated above the proximal end of Mt. II. He infers that it may represent a fused entocuneiform and rudimentary Mt. I. Its posterodistal end is rounded.
C. B. Schultz and C. H. Falkenbach 1954SKULL: Smaller than skulls of D. (P.) sanfordi and Merycoides cursor; prelacrimal fossa present; bulla large.
MANDIBLE: (See discussion below).
DENTITION: Superior series estimated to be shorter than examples of D. (P.) sanfordi, slightly longer than those of M. cursor.
LIMBS:Resembling examples of Subdesmatochoerus socialis.