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Ustatochoerus californicus

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Merycochoerus californicus was named by Merriam (1919). Its type specimen is UC 21351, a partial skull (Fragmentary skull with P3-P4 alv. and M1-M3 (M2-M3 br.)), and it is a 3D body fossil. Its type locality is Ricardo Ampitheater, which is in a Clarendonian terrestrial horizon in the Dove Spring Formation of California.

It was recombined as Metoreodon californicus by Matthew (1924) and Thorpe (1937); it was synonymized subjectively with Merychyus major by Lander (1998); it was recombined as Ustatochoerus californicus by Schultz and Falkenbach (1941), Stevens and Stevens (1989) and Stevens and Stevens (2007).

Synonymy list
YearName and author
1919Merycochoerus californicus Merriam
1924Metoreodon californicus Matthew
1937Metoreodon californicus Thorpe
1941Ustatochoerus californicus Schultz and Falkenbach p. 14
1989Ustatochoerus californicus Stevens and Stevens
2007Ustatochoerus californicus Stevens and Stevens p. 166

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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
speciescalifornicus()

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.-Larger than that of U. major; malar very deep below the orbit. MANDIBLE.-Known only from symphysis; larger than that of U. major. DENTITION.-Dental series longer and more robust than in U. major. LIMBs.-Unknown.