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Merycochoerus

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Merycochoerus was named by Leidy (1858) [said by Cope 1884 to be a nomen nudum in Leidy 1858 and Leidy 1869, but validated by Leidy 1873; however, Cope then accepts 1858 as the correct date for M. proprius]. Its type is Merycochoerus proprius.

It was assigned to Oreodontidae by Cope (1884); to Merycoidodontidae by Leidy (1858) and Lander (1998); and to Merycochoerinae by Schultz and Falkenbach (1940) and Stevens and Stevens (2007).

Synonyms
Synonymy list
YearName and author
1858Merycochoerus Leidy
1884Merycochoerus Cope p. 520
1901Paracotylops Matthew
1901Merycochoerus (Brachycrus) Matthew p. 397
1904Brachycrus Palmer p. 141
1907Pronomotherium Douglass
1940Brachycrus Schultz and Falkenbach p. 218
1940Merycochoerus Schultz and Falkenbach p. 277
1945Brachycrus Simpson p. 149
1968Brachycrus Schultz and Falkenbach
1988Brachycrus Kelly and Lander
1998Brachycrus Lander
1998Merycochoerus Lander
2007Merycochoerus Stevens and Stevens p. 160
2007Brachycrus Stevens and Stevens p. 164

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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
subfamilyMerycochoerinae
genusMerycochoerus

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 1940SKULL.-Medium to very large size; brachycephalic; occipital region fan- shaped with supraoccipital crests protruding posteriorly; cranial region fore- shortened; brain case laterally expanded; frontals wide and moderately convex; zygomatic arches of medium to heavy construction; malars under orbits deep; nasals much reduced; infraorbital foramina above region of M 1 ; muzzle moder- ately to extremely deep; maxillre form a curve along the upper contour in advance of the anterior narial opening; pronounced extension of· the posterior palate to the pterygoid region; bullre inflated but small for size of skull.
MANDIBLE.-Medium to large; long symphysis, with tuberosity on the posterior border.
DENTITION-Brachyodont.
LIMBs.-Moderately heavy to robust; feet vary from long and light to short and heavy.