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Desmatochoerus curvidens

Mammalia - Merycoidodontidae

Taxonomy
Promerycochoerus (Desmatochoerus) curvidens was named by Thorpe (1921). Its type specimen is YPM 10997, a partial skull, and it is a 3D body fossil.

It was recombined as Promerycochoerus curvidens by Thorpe (1937); it was synonymized subjectively with Desmatochoerus megalodon by Stevens and Stevens (1996); it was synonymized subjectively with Eporeodon major by Lander (1998); it was recombined as Desmatochoerus curvidens by Schultz and Falkenbach (1954), Macdonald (1963), Macdonald (1970) and Stevens et al. (2023).

Synonyms
Synonymy list
YearName and author
1921Promerycochoerus (Desmatochoerus) curvidens Thorpe p. 241 figs. 6A, B
1937Promerycochoerus curvidens Thorpe p. 117 figs. Figs. 77-78
1940Promerycochoerus grinnelli Koerner
1954Desmatochoerus curvidens Schultz and Falkenbach p. 182 figs. 4-7
1954Desmatochoerus hatcheri geringensis Schultz and Falkenbach p. 187 figs. Figures 5-7, 18
1954Desmatochoerus hatcheri grinnelli Schultz and Falkenbach p. 189 figs. 5 - 7
1954Desmatochoerus hatcheri niobrarensis Schultz and Falkenbach p. 191 figs. Figures 5-7, 24-25
1963Desmatochoerus curvidens Macdonald
1970Desmatochoerus curvidens Macdonald
2023Desmatochoerus curvidens Stevens et al. p. 57 figs. Figures 42B, 43; Appendix 4A; Table A19

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
RankNameAuthor
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
familyMerycoidodontidae
subfamilyPromerycochoerinae
genusDesmatochoerus()
speciescurvidens()

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.

Desmatochoerus curvidens Thorpe 1921
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Invalid names: Desmatochoerus hatcheri geringensis Schultz and Falkenbach 1954 [synonym], Desmatochoerus hatcheri niobrarensis Schultz and Falkenbach 1954 [synonym], Promerycochoerus grinnelli Koerner 1940 [synonym]
Diagnosis
ReferenceDiagnosis
M. R. Thorpe 1921Small size; infra-orbital foramen above posterior part of P3; bullæ compressed, not extending below postglenoid process; steop basicranial axis; p 2 and P 3 crowded, unreduced; inferior border of ramus turns sharply downward below anterior part of M3 ; zygomatic arch narrow immediately in advance of the glenoid process, continuing forward and upward in a strong convexity on the side of face, more as in Eporeodon than in Promerycochoerus lacrymal fossæ deep but small; depth of malar below orbit, 29 mm.; hypocone of M3 noticeably smaller than protocone; internal cingulum on superior molars but faintly developed; transverse crests near together; very strong convexity above foramen magnum; crest of zygoma low and directly above glenoid process. Shape of the canine more like that of a carnivore than an herbivore.
C. B. Schultz and C. H. Falkenbach 1954SKULL: Medium size; approximate size of examples of D. hatcheri, smaller than in D. leiityi; anterior nasal-maxilla contact approximately above P 1 ; infraorbital foramen above posterior portion of P 8 ; muzzle narrower than in D. hatcheri; postglenoid process wide transversely, rounded in D. hatcheri.
MANDIBLE: Approximately same size as examples of D. hatcheri; postsymphysis below P2 (below P2 in D. hatcheri); inferior border of ramus with more abrupt downward curve posterior to M2 than usually found in this genus.
DENTITION: Series shorter than in D. leiityi, slightly shorter than in D. hatcheri.
LIMBS: (Unknown).
M. S. Stevens et al. 2023Medium-sized (M1-3 length = 68-75 mm) species of Desmatochoerus.