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Pleurolicus sulcifrons

Mammalia - Rodentia - Geomyidae

Taxonomy
Pleurolicus sulcifrons was named by Cope (1878) [genotype]. It is the type species of Pleurolicus.

Synonyms
Synonymy list
YearName and author
1878Pleurolicus sulcifrons Cope
1881Pleurolicus diplophysus Cope
1936Grangerimus oregonensis Wood
1936Pleurolicus copei Wood
1996Pleurolicus sulcifrons Korth p. 783

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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
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
superfamilyGeomyoideaBonaparte 1845
familyGeomyidaeBonaparte 1845
genusPleurolicus
speciessulcifrons

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
E. D. Cope 1878
Specif. Char. This species resembles those of the allied genus Entop- tychus in many respects. The superciliary borders are thickened upwards, forming two ridges, which enclose a groove between them which is more pronounced than in the Entoptychus cavifrons. The muzzle is plane above and considerably wider than the interorbital space. The base of the ma- lar is thin and oblique, and the foramen infraorbitale exterius is well in advance of the molar teeth and at the anterior part of the maxillary bone. A groove passes backwards from its inferior border, terminating in a small foramen which marks a point nearly lialf way to the first molar. Within
this, another shallow groove bounds the more prominent median line. The palatal surface exhibits two shallow lateral grooves, which commence op- posite the posterior border of the first molar.
The grinding surfaces of the molars are transverse ovals, only interrupted by the exterior fissure. The first molar is slightly different in form, being larger, and its section, when not much worn, being nearly round. Its an- terior portion extends towards the alveolus, giving an antero-posterior oval, on prolonged wear. Each tooth has three roots, one interior and two exterior; in the first they may be described as two posterior and one ante- rior. The last molar is the smallest, the series exhibiting a regular grada- tion in size.