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Pseudomesoreodon rolli

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Pseudomesoreodon rolli was named by Schultz and Falkenbach (1950). Its type specimen is F:AM 34481, a partial skull (Partial skull with P3-M3), and it is a 3D body fossil. Its type locality is North Boulder Valley, which is in a Harrisonian terrestrial horizon in the Renova Formation of Montana.

It was synonymized subjectively with Hypsiops bannackensis by Lander (1998).

Synonymy list
YearName and author
1950Pseudomesoreodon rolli Schultz and Falkenbach p. 131 figs. 8-10, 13

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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
subfamilyPhenacocoelinae
genusPseudomesoreodon
speciesrolli

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 1950SKULL: Intermediate in length between that of P. rooneyi and of 'IP. boulderensis; brachycephalic; low; frontals very wide; posterior border of nasals extending posteriorly beyond anterior border of orbit (nasals not preserved in holotype); posterior superior border of squamosal of zygomatic arch extending posteriorly to a point above middle of postglenoid process; malar deep below orbit, equal to that of P. rooneyi, but considerably less than in P. boulderensis; paroccipital process wider at base than in other two species of genus; postglenoid process more massive than in P. rooneyi.
MANDIBLE: (Unknown.)
DENTITION: [known from P2-P4 only] larger than in other two species of this genus; molar series longer and heavier than in type of P. rooneyi and slightly heavier but approximately same length as in holotype of ?P. boulderensis.
LIMBS: (Unknown).