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Citellus (Otospermophilus) bensoni

Mammalia - Rodentia - Sciuridae

Taxonomy
Citellus bensoni was named by Gidley (1922). Its type specimen is USNM 10531, a set of teeth (A first or second upper molar of the right side and a last upper molar of the left side), and it is a 3D body fossil.

It was recombined as Citellus (Otospermophilus) bensoni by Bryant (1945); it was recombined as Spermophilus bensoni by Hemming (1956), Shotwell (1968) and Kurten and Anderson (1980).

Sister species lacking formal opinion data
C. major, C. parryi, C. primigenius, C. superciliosus, C. tridecemlineatus, C. xanthoprymnus

Synonymy list
YearName and author
1922Citellus bensoni Gidley p. 122 figs. , pl. 34, figs. 3
1945Citellus (Otospermophilus) bensoni Bryant p. 354
1956Spermophilus bensoni Hemming
1963Citellus bensoni Black
1968Spermophilus bensoni Shotwell
1980Spermophilus bensoni Kurten and Anderson p. 213

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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()
—Mammaliamorpha
RankNameAuthor
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
superfamilySciuroidea
familySciuridae
tribeMarmotini
genusCitellusBrandt 1844
subgenusOtospermophilus
speciesbensoni()

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.

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Diagnosis
ReferenceDiagnosis
M. D. Bryant 1945Length of mandibular tooth row about 10.3. Summit of the right upper molar narrow; anterior cingulum, protoloph, and metaloph about equal in length; metaloph with distinct metacone and metaconule, the latter rounded and not connected to the protocone. Posterior part of M3 like that of C. cochisei. MP3 relatively small as compared with M3 in living species, and with an isolated metaconule
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: Hendy et al. 2009, Carroll 1988, Ji et al. 2002, Nowak 1991, Lillegraven 1979

Age range: base of the Blancan to the top of the Irvingtonian or 4.90000 to 0.30000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
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)
Irvingtonian1.8 - 0.3USA (California) Citellus bensoni (20387)