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Ustatochoerus profectus

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Merychyus (Metoreodon) profectus was named by Matthew and Cook (1909). Its type specimen is AMNH 14055, a mandible, and it is a 3D body fossil. It is the type species of Ustatochoerus.

It was synonymized subjectively with Metoreodon major by Matthew and Cook (1912) and Matthew (1924); it was recombined as Ticholeptus profectus by Loomis (1924); it was recombined as Ustatochoerus profectus by Schultz and Falkenbach (1941), Schultz and Falkenbach (1947) and Stevens and Stevens (1989); it was considered a nomen vanum by Lander (1998).

Synonymy list
YearName and author
1909Merychyus (Metoreodon) profectus Matthew and Cook p. 394 fig. 15
1917Merychyus (Metoreodon) profectus Barbour and Cook
1917Merychyus (Metoreodon) profectus Matthew and Cook
1924Ticholeptus profectus Loomis
1937Merychyus (Metoreodon) profectus Thorpe
1941Ustatochoerus profectus Schultz and Falkenbach p. 36
1947Ustatochoerus profectus Schultz and Falkenbach
1989Ustatochoerus profectus Stevens and Stevens

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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
speciesprofectus()

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.-Smaller than that of U. major and larger than that of U. medius; fan-shaped occipital region not as wide as in U. major; brain case slightly more inflated than in U. major; nasals shorter than in U. medius and decidedly longer than in U. major, and with less retraction than in the latter species; anterior tip of nasals retracted to region above P 2 ; paroccipital process long and tapered; postglenoid process not as heavy as in U. major.
MANDIBLE.-Typical of the genus, intermediate in size between those of U. medius and U. major.
DENTITION.-Superior and inferior series intermediate in length between those of U. medius and U. major.
LIMBs.-Shorter and lighter than in U. major; longer and heavier than in U. medius.