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Hypsiops erythroceps

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Promerycochoerus erythroceps was named by Stock (1932). Its type specimen is CIT 486, a partial skull (Anterior portion of skull with I1-I3 rt. and C(br.)-M1(br.) (P1-P3 br.)), and it is a 3D body fossil. Its type locality is Tecuya Canyon, which is in an Arikareean terrestrial horizon in the Tecuya Formation of California.

It was recombined as Hypsiops erythroceps by Schultz and Falkenbach (1950) and Stirton (1960); it was synonymized subjectively with Eporeodon latidens by Lander (1998); it was synonymized subjectively with Mesoreodon chelonyx by Tabrum and Nichols (2001).

Synonymy list
YearName and author
1932Promerycochoerus erythroceps Stock
1950Hypsiops erythroceps Schultz and Falkenbach p. 121 fig. 9
1960Hypsiops erythroceps Stirton p. 361

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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
orderArtiodactyla()
suborderTylopoda()
superfamilyOreodontoidea
familyMerycoidodontidaeThorpe 1923
subfamilyMerycochoerinae
genusHypsiops
specieserythroceps()

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
C. B. Schultz and C. H. Falkenbach 1950SKULL: Larger (known from anterior portion of skull only) than other species of genus, approaching Promerycochoerus in size; nasals moderately heavy and pointed, anteriorly retracted to area above posterior portion of C/ (similar to the holotype of H. johndayensis); anterior nasal-maxilla contact above P 1.
MANDIBLE: Unknown.
DENTITION: p3 and P 4 with anterior intermediate crest (see discussion following). (Dentition incomplete and poorly preserved.)
LIMBS: Unknown.