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Copemys shotwelli

Mammalia - Rodentia - Cricetidae

Taxonomy
Tregomys shotwelli was named by Wilson (1968) [genotype]. Its type specimen is UMMP V55787, a mandible (sin. with complete dentition), and it is a 3D body fossil. Its type locality is WaKeeny (UM-K6-59), which is in a Clarendonian channel sandstone/claystone in the Ogallala Formation of Kansas. It is the type species of Tregomys.

It was recombined as Copemys shotwelli by Lindsay (1972).

Synonymy list
YearName and author
1968Tregomys shotwelli Wilson p. 119 figs. Textfig. 16 e-g
1972Copemys shotwelli Lindsay
1990Tregomys shotwelli Voorhies
1995Tregomys shotwelli Sutton and Korth

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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()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
infraorderMyodontaSchaub 1958
superfamilyMuroideaIlliger 1811
familyCricetidaeFischer von Waldheim 1817
genusCopemys
speciesshotwelli()

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
R. L. Wilson 1968A small cricetid with low-cusped, simple molars; m1 with medial anteroconids and subequal anterior cingula; metaconid and protoconid nearly opposite with the posterior side of the latter sloping farther posteriad; m2 sqaurish and realtively large, wider than m1; second lower molar with heavy cingulum on the anterolabial side; masseteric crests low, terminating anteriad at the level of the laterally positioned mental foramen; jaw relatively thin, the depth below m1 greater than the total length of the lower molars; m1 length less than 1.2 mm in well worn specimens; m3 relatively large with greatest transverse width nearly equal to other lower molars; roots on the lower molars long.