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Citellus (Otospermophilus) argonautus

Mammalia - Rodentia - Sciuridae

Taxonomy
Otospermophilus argonautus was named by Stirton and Goeriz (1942). Its type specimen is UCMP 34281, a partial skeleton (A fragment of a right mandibular ramus with P4 and M1, and pieces of the pelvis), and it is a 3D body fossil. Its type locality is Schell Ranch, which is in a Miocene terrestrial horizon in California.

It was recombined as Citellus (Otospermophilus) argonautus by Bryant (1945); it was recombined as Citellus argonautus by Wilson (1949) and Black (1963); it was recombined as Spermophilus argonautus by Shotwell (1968), Wilson and Reeder (1993) and Korth (1994).

Synonymy list
YearName and author
1942Otospermophilus argonautus Stirton and Goeriz
1945Citellus (Otospermophilus) argonautus Bryant p. 353
1949Citellus argonautus Wilson
1963Citellus argonautus Black
1968Spermophilus argonautus Shotwell
1986Otospermophilus argonautus Barnosky
1993Spermophilus argonautus Wilson and Reeder
1994Spermophilus argonautus Korth

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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()
Therapsida()
RankNameAuthor
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
superfamilySciuroidea
familySciuridae
tribeMarmotini
genusCitellusCuvier 1825
subgenusOtospermophilus
speciesargonautus()

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 1945Mandibular ramus small, about the size of that of Citellus gidleyi; p4 and m1 relatively large; m1 long in relation to width, nearly rhomboidal in occlusal view; mesostylids absent; ectolophids situated well in from labial margin of m1. Masseteric crests more prominent than in C. gidleyi.