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Protospermophilus angusticeps

Mammalia - Rodentia - Sciuridae

Taxonomy
Sciurus angusticeps was named by Matthew (1933). Its type specimen is AMNH 21336, a partial skull ( skull without the left zygomatic arch, third premolars, left M2, and third molars), and it is a 3D body fossil.

It was recombined as Protospermophilus angusticeps by Bryant (1945) and Black (1963).

Synonymy list
YearName and author
1933Sciurus angusticeps Matthew
1945Protospermophilus angusticeps Bryant p. 349
1963Protospermophilus angusticeps Black

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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
superfamilySciuroidea
familySciuridae
genusProtospermophilusGazin 1930
speciesangusticeps(Matthew 1933)

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 near the size of that of P. malheurensis; larger than that of P. tephrus. Cranium moderately inflated, about as in Otospermophilus; rostrum relatively broader than in P. malheurensis and relatively narrower than in P. quatalensis; palate broad; notch in ventral border of zygomatic plate opposite P4. P3 larger than in P. quatalensis; other cheek 'teeth large. The diagnosis given by Matthew (1933 :4) is primarily generic rather than specific.