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Urocitellus richardsonii

Osteichthyes - Rodentia - Sciuridae

Taxonomy
Arctomys richardsonii was named by Sabine (1822). It is extant.

It was recombined as Citellus richardsonii by Gazin (1930); it was recombined as Spermophilus richardsonii by Kurten and Anderson (1980); it was recombined as Urocitellus richardsonii by Helgen et al. (2009).

Sister species lacking formal opinion data
Citellus undulatus, U. beldingi, U. undulatus

Synonymy list
YearName and author
1822Arctomys richardsonii Sabine
1930Citellus richardsonii Gazin
1980Spermophilus richardsonii Kurten and Anderson p. 214
2009Urocitellus richardsonii Helgen et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
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
genusUrocitellusObolenskij 1927
speciesrichardsonii(Sabine 1822)

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
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: Hendy et al. 2009, Ji et al. 2002, Lillegraven 1979, Carroll 1988, Nowak 1991

Age range: base of the Middle Pleistocene to the top of the Late/Upper Pleistocene or 0.77400 to 0.01170 Ma

Collections (24 total)


Time interval Ma Country or state Original ID and collection number
Irvingtonian1.4 - 0.21Canada (Alberta) Spermophilus richardsonii (20529)
Irvingtonian1.4 - 0.21USA (Kansas) Citellus richardsonii (20165 20301 20332 20391 20516) Spermophilus richardsonii (20293 20312 20352 20553 20567)
Irvingtonian1.4 - 0.21USA (Nebraska) Spermophilus richardsonii (20347 20376 20500 20523)
Irvingtonian1.4 - 0.21USA (Oklahoma) Citellus richardsonii (20309)
Middle Pleistocene0.774 - 0.129USA (Colorado) Spermophilus richardsonii (20359 20369)
Late/Upper Pleistocene (late glacial)0.129 - 0.0117USA (Colorado) Spermophilus richardsonii (74953 74954)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117Canada (Alberta) Citellus richardsonii (20615)
Late/Upper Pleistocene (high glacial)0.129 - 0.0117USA (Nebraska) Spermophilus richardsonii (93179)
Late/Upper Pleistocene0.129 - 0.0117USA (Montana) Spermophilus richardsonii (162132)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117Canada (Saskatchewan) Spermophilus richardsonii (20635)