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Ustatochoerus skinneri

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Ustatochoerus skinneri was named by Schultz and Falkenbach (1941). Its type specimen is F:AM 33630, a partial skeleton ( Skull (lacking left zygomatic arch) with I1-M3, mandible with i1-m3, partial humerus, femur, and partial tibia. (w+)), and it is a 3D body fossil. Its type locality is Turtle Butte (Cap Rock), which is in a Clarendonian terrestrial horizon in the Ash Hollow Formation of South Dakota.

It was synonymized subjectively with Merychyus novomexicanus by Lander (1998).

Synonymy list
YearName and author
1941Ustatochoerus skinneri Schultz and Falkenbach p. 47

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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
subfamilyUstatochoerinae
genusUstatochoerus
speciesskinneri

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 1941SKULL.-Differs from U. major, the nearest form, in somewhat smaller size; occipital flare not as wide; nasals much longer and less retracted (an- terior tip of nasals above region of P2); palate not extended as far posteriorly.
MANDIBLE.-Not quite as long as that of U. major.
DENTITION.-Superior and inferior series of approximately same length as examples of U. major; inferior canine smaller and Pr lighter than in U. major; P4 usually lacks deep internal groove found in U. major.
LIMBs.-Heavier and shorter than those of U. major; nearly same length as those of U. profectus.