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Otospermophilus

Mammalia - Rodentia - Sciuridae

Taxonomy
Otospermophilus was named by Brandt (1844). It is extant.

It was reranked as Citellus (Otospermophilus) by Bryant (1945); it was synonymized subjectively with Citellus by Shotwell (1956) and Black (1963); it was synonymized subjectively with Spermophilus by Hall (1981), Wilson and Reeder (1993), Korth (1994) and Sutton and Korth (1995).

It was assigned to Sciuridae by Schultz and Howard (1935); to Citellus by Bryant (1945); and to Marmotini by Helgen et al. (2009).

Synonymy list
YearName and author
1844Otospermophilus Brandt
1935Otospermophilus Schultz and Howard p. 279
1942Otospermophilus Stirton and Goeriz
1945Citellus (Otospermophilus) Bryant p. 353
1965Otospermophilus Gromov and et al.
1986Otospermophilus Barnosky
2009Otospermophilus Helgen et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
superfamilySciuroidea
familySciuridae
tribeMarmotini
genusOtospermophilusBrandt 1844

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.

G. Otospermophilus Brandt 1844
show all | hide all
†Citellus (Otospermophilus) argonautus Stirton and Goeriz 1942
†Citellus (Otospermophilus) gidleyi Merriam et al. 1925
Otospermophilus beecheyi Richardson 1823 [California ground squirrel]
Otospermophilus variegatus Erxleben 1777 [rock squirrel]
Otospermophilus variegatus grammurus Helgen et al. 2009 [rock squirrel]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: scansorialf
Diet: granivoref
Diet 2: frugivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-26 13:04:24
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Carroll 1988, Ji et al. 2002, Nowak 1991, Hendy et al. 2009

Age range

Maximum range based only on fossils: base of the Hemphillian to the top of the Holocene or 10.30000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 9.4 Ma

Collections (38 total)


Time interval Ma Country or state Original ID and collection number
Clarendonian12.5 - 9.4USA (California) Citellus sp. (19185 19393)
Hemphillian10.3 - 4.9USA (Oregon) O. gidleyi (19015)
Hemphillian10.3 - 4.9USA (Nevada) Citellus argonautus (19095)
Hemphillian10.3 - 4.9USA (California) O. argonautus (19537)
Hemphillian10.3 - 4.9USA (Idaho) Spermophilus gidleyi (19034)
Blancan4.9 - 1.8USA (California) Rodentia indet. (20540)
Blancan4.9 - 1.8USA (Arizona) Citellus bensoni (19628) Spermophilus bensoni (19638 19646 19650)
Blancan - Irvingtonian4.9 - 0.3USA (Arizona) Spermophilus bensoni (19652)
Pleistocene - Holocene2.588 - 0.0USA (Texas) Citellus grammurus (93258)
Irvingtonian1.8 - 0.3USA (Arizona) Spermophilus variegatus (20446)
Irvingtonian1.8 - 0.3USA (California) Citellus bensoni (20387) Spermophilus sp. (20187)
Irvingtonian1.8 - 0.3USA (New Mexico) Spermophilus variegatus (20505 20506)
Irvingtonian - Rancholabrean1.8 - 0.012USA (California) Spermophilus beecheyi (20323)
Middle Pleistocene0.774 - 0.129USA (California) Citellus beecheyi (20639)
Rancholabrean (glacial)0.3 - 0.012USA (California) Citellus beecheyi (20624)
Late/Upper Pleistocene0.129 - 0.0117USA (California) O. sp. (225801)
Late/Upper Pleistocene0.129 - 0.0117Mexico (Puebla) Spermophilus variegatus (71308)
Late/Upper Pleistocene0.129 - 0.0117USA (Wyoming) Spermophilus variegatus (93277)
Late/Upper Pleistocene0.129 - 0.0117USA (Texas) Spermophilus variegatus (74473)
Late/Upper Pleistocene0.129 - 0.0117USA (New Mexico) O. grammurus (93281)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117USA (California) Spermophilus beecheyi (20642)
Late/Upper Pleistocene (high glacial)0.129 - 0.0117USA (New Mexico) Spermophilus variegatus (76060)
Late/Upper Pleistocene - Holocene (late glacial)0.129 - 0.0USA (Arizona) Spermophilus variegatus (93374)
Late/Upper Pleistocene - Holocene0.129 - 0.0Mexico (Chihuahua) Spermophilus variegatus (71263)
Holocene0.0117 - 0.0USA (Texas) Spermophilus variegatus (74474)
Holocene0.0117 - 0.0USA (Arizona) Spermophilus variegatus (63708 63710 63715 63721 63722 63723 63724)