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Ustatochoerus

Mammalia - Artiodactyla - Merycoidodontidae

Synonymy list
YearName and author
1941Ustatochoerus Schultz and Falkenbach p. 10
2007Ustatochoerus Stevens and Stevens p. 166

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
RankNameAuthor
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderArtiodactyla()
suborderTylopoda()
superfamilyOreodontoidea
familyMerycoidodontidaeThorpe 1923
subfamilyUstatochoerinae
genusUstatochoerus

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.-Medium to large size, ranging in length from approximately 220 mm. to 325 mm.; brachycephalic; occipital region fan-shaped (somewhat simi- lar to Brachycrus Matthew); sagittal crest prominent; brain case moderately inflated; zygomatic arch moderately light for size of skull; orbits large (com- pared to Brachycrus and M erycochoerus), looking forward and upward; pre- lacrimal pit moderately deep; prelacrimal vacuity usually present; infraorbital foramina above region of P4 and M1; slight to moderate retraction of nasals (not as great as in Brachycrus and M erycochoerus); premaxillae fused for short distance; paroccipital process long and wide at base, forming the lower part of the fan-shaped occipital region; postglenoid process narrow anteroposteriorly but prominent; bullre divided into two portions 2 with inflated area between the paroccipital and postglenoid processes and deflated area anterior to the par- occipital process.
MANDIBLE.-Shallow for size of the skull; inferior border of ram us almost parallel to the tooth series, with a slight downward curve below Ma.
DENTITION.-Moderately hypsodont; I~very prominent, at least twice the size of It premolars complicated; superior premolars with a definite cusp on the anterior intermediate crest, and often with a small cusp on the center of the posterior crescent; internal and external cingula usually well developed on pre- molars; external styles of molars prominent; inferior premolars crowded, slightly grooved externally, with cusps situated internally at center of the anterior crests; M 3 with large heel.
LIMBs.-Moderately heavy (compared to those of most genera of oreodonts).