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Promerycochoerus latidens

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Promerycochoerus latidens was named by Thorpe (1921). Its type specimen is YPM 10961, a partial skull, and it is a 3D body fossil.

It was synonymized subjectively with Promerycochoerus chelydra by Thorpe (1937); it was synonymized subjectively with Merycochoerus superbus by Lander (1998).

Synonymy list
YearName and author
1921Promerycochoerus latidens Thorpe p. 232 figs. 2A, B, C
1949Promerycochoerus latidens Schultz and Falkenbach p. 102 figs. 2-4, 11, 12, 25, 26

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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
subfamilyPromerycochoerinae
genusPromerycochoerus
specieslatidens

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
M. R. Thorpe 1921Great bizygomatic diameter; malar very wide below orbit; lacrymal fossæ well marked;vertical diameter of orbits slightly greater than transverse; zygomatic arch shallow V -shaped; infra-orbital foramen above P4; bullæ relatively small, and triangular in basal outline; palate moderately pl'oduced posteriorly; no internal cingulum on superior molars.
C. B. Schultz and C. H. Falkenbach 1949SKULL:Large and massive (lighter in sup- posed female examples); supraoccipital re- gion produced posteriorly beyond the occipi- tal condyles with lateral wings not widely spread; sagittal crest high; brain case in- flated; frontals wide (narrower in supposed females); anterior nasal-maxilla contact in region above the anterior portion of P 1 ; malar deep below the orbit; zygomatic arch robust (lighter in supposed female examples), with straight posterior border, i.e., not hooked
as in P. carrikeri; occipital condyles of moder- ate size; paroccipital process with more lat- eral twist than in examples of P. superbus or P. carrikeri; bulla more suboval in outline than in examples of P. superbus; postglenoid process robust, larger than in examples of P. superbus; posterior palate projectingpos- teriorly beyond M 1 , but not to the extent found in examples of P. (Pseudopromeryco- choerus).
MANDIBLEM:assive;postsymphysisbelow anterior portion of Pa.
DENTITION:Average dental series longer than in examples of P. superbus, but approxi- mately equal to that of P. carrikeri.
LIMBS: Robust; somewhat larger than in average examples of P. carrikeri; heavier and longer than in examples of P. (Pseudopromerycochoerus) montanus.