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Pliophenacomys meadensis

Mammalia - Rodentia - Cricetidae

Taxonomy
Pliophenacomys meadensis was named by Hibbard (1956). Its type specimen is UMMP 32019, a mandible (sin with m1, m2), and it is a 3D body fossil. Its type locality is Sanders (UM-K2-53), which is in a Blancan terrestrial horizon in the Ballard Formation of Kansas.

It was recombined as Mimomys meadensis by Repenning (1987); it was recombined as Ophiomys meadensis by Hibbard and Zakrzewski (1967), Kurten and Anderson (1980), Barnosky (1985) and Martin et al. (2002).

Synonymy list
YearName and author
1956Pliophenacomys meadensis Hibbard
1967Ophiomys meadensis Hibbard and Zakrzewski
1980Ophiomys meadensis Kurten and Anderson p. 255
1985Ophiomys meadensis Barnosky
1987Mimomys meadensis Repenning
2002Ophiomys meadensis Martin et al.

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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()
Amniota
Synapsida()
Therapsida()
RankNameAuthor
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
infraorderMyodontaSchaub 1958
superfamilyMuroideaIlliger 1811
familyCricetidaeFischer von Waldheim 1817
subfamilyMicrotinae
genusPliophenacomys
speciesmeadensisHibbard 1956

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. W. Hibbard 1956Pliophenacomys meadensis is larger tha P. primaevus Hibbard and P. parvus (Wilson). The mental foramen is not so dorsal as in P. primaevus, and the capsular process for the base of the incisor on the coronoid process of the ascending ramus is better developed. The number of roots of M2 varies from two to three; M3 is two-rooted. In P. primaevus M2 has three roots, and M3 generally has two, although three roots are sometimes present. The posterior loop of the M3 in P. meadensis is more hook-shaped, like that of P. parvus (Wilson), than the posterior loop in P. primaevus, which is rounded.