PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Citellus (Otospermophilus) gidleyi

Osteichthyes - Rodentia - Sciuridae

Taxonomy

Citellus gidleyi was named by Merriam et al. (1925). Its type specimen is UCMP 26793, a mandible (A part of a left mandibular ramus without the anterior tip and the vertical ramus, all of the cheek teeth well preserved), and it is a 3D body fossil. Its type locality is Rattlesnake, which is in a Hemphillian terrestrial siltstone in the Rattlesnake Formation of Oregon.

It was recombined as Citellus (Otospermophilus) gidleyi by Bryant (1945); it was recombined as Otospermophilus gidleyi by Barnosky (1986); it was recombined as Spermophilus gidleyi by Hemming (1956), Shotwell (1968), Wilson and Reeder (1993), Korth (1994).

Sister species lacking formal opinion data

C. beecheyi, C. beecheyi, C. citelloides, C. major, C. parryi, C. polonicus, C. primigenius, C. spilosoma, C. superciliosus, C. tridecemlineatus, C. undulatus, C. xanthoprymnus, C. citelloides, C. superciliosus, C. undulatus

Synonymy list

Year	Name and author
1925	Citellus gidleyi Merriam et al.
1945	Citellus (Otospermophilus) gidleyi Bryant p. 353
1956	Spermophilus gidleyi Hemming
1963	Citellus gidleyi Black
1968	Spermophilus gidleyi Shotwell
1986	Otospermophilus gidleyi Barnosky
1993	Spermophilus gidleyi Wilson and Reeder
1994	Spermophilus gidleyi Korth

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	Osteichthyes
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha

Rank	Name	Author
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Euarchontoglires	Murphy et al. 2001
—	Gliriformes	Wyss and Meng 1996
—	Glires	()
—	Simplicidentata	()
order	Rodentia	Bowdich 1821
superfamily	Sciuroidea
family	Sciuridae
tribe	Marmotini
genus	Citellus	Brandt 1844
subgenus	Otospermophilus
species	gidleyi	()

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.

†Citellus (Otospermophilus) gidleyi Merriam et al. 1925

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Diagnosis

Reference	Diagnosis
M. D. Bryant 1945	The mandibular ramus smaller and mandibular tooth row shorter than in Recent species of Olospermophilus. Notches between protoconids and parametaconids shallow; ectolophids submarginal; distinct mesostylids on m1 and m2; ectotylids on all molars; talonid basins shallow.

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

Age range: Hemphillian or 9.40000 to 4.70000 Ma

Collections (2 total)

Time interval	Ma	Country or state	Original ID and collection number
Hemphillian	9.4 - 4.7	USA (Idaho)	Spermophilus gidleyi (19034)
Hemphillian	9.4 - 4.7	USA (Oregon)	Otospermophilus gidleyi (type locality: 19015)