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Protospermophilus tephrus

Mammalia - Rodentia - Sciuridae

Taxonomy
Sciurus tephrus was named by Gazin (1932). Its type specimen is CIT 332, a partial skull ( skull without the zygomatic arches, the posterior part of the cranium, and the left cheek teeth; incisors broken off at alveoli.), and it is a 3D body fossil. Its type locality is Skull Spring, which is in a Barstovian terrestrial horizon in the Butte Creek Volcanic Sandstone Formation of Oregon.

It was recombined as Protospermophilus tephrus by Bryant (1945); it was recombined as Citellus tephrus by Black (1963); it was recombined as Otospermophilus tephrus by Barnosky (1986); it was recombined as Spermophilus tephrus by Shotwell (1968), Wilson and Reeder (1993) and Korth (1994).

Synonymy list
YearName and author
1932Sciurus tephrus Gazin
1945Protospermophilus tephrus Bryant p. 349
1963Citellus tephrus Black
1968Spermophilus tephrus Shotwell
1986Otospermophilus tephrus Barnosky
1993Spermophilus tephrus Wilson and Reeder
1994Spermophilus tephrus 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
superfamilySciuroidea
familySciuridae
genusProtospermophilusGazin 1930
speciestephrus()

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
M. D. Bryant 1945Skull small and slender. Rostrum slender, depth greater than width; ridges on premaxillae lateral to incisors low; interorbital region narrow; fossa on anterior surface of zygomatic plate small; notch in ventral border of zygomatic plate opposite posterior margin of P4; fossae anterolateral to incisive foramina shallow.