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Sigmodon curtisi

Mammalia - Rodentia - Cricetidae

Taxonomy
Sigmodon curtisi was named by Gidley (1922). Its type specimen is USNM 10510, a mandible, and it is a 3D body fossil.

Synonymy list
YearName and author
1922Sigmodon curtisi Gidley
1980Sigmodon curtisi Kurten and Anderson p. 251

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
EuarchontogliresMurphy et al. 2001
GliriformesWyss and Meng 1996
Glires()
Simplicidentata()
orderRodentiaBowdich 1821
infraorderMyodontaSchaub 1958
superfamilyMuroideaIlliger 1811
Eumuroida
familyCricetidaeFischer von Waldheim 1817
tribeSigmodontiniWagner 1843
genusSigmodonSay and Ord 1825
speciescurtisi

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.

Sigmodon curtisi Gidley 1922
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Diagnosis
ReferenceDiagnosis
J. W. Gidley 1922Length of cheek-tooth series 7 millimeters; about the size of S. hispidus arizonae, which it seems to resemble more nearly, but it differs from that as well as the other living species in the more open valleys of the reentrant angles, the more compressed lophs, the less hypsodont condition of the cheek teeth, the relatively deeper posterior inner reentrant valley of p4 and m1, and especially the form and proportions of the cusps of the last lower molar, which is relatively larger, with the hinder cusp relatively broader and fuller than in the living species. A feature that is characteristic of this and the species described below [Sigmodon minor] and is not observed in any of the living species is noted in the last molar, in which the great extension and flattening of the inner or lingual wall of the posterior lobe forms a sharp right angle with the posterior wall of the reentrant angle on that side.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingg
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2012-05-15 12:54:46
Modified: 2012-05-14 21:54:46
Source: g = genus, o = order, subc = subclass, c = class, subp = subphylum
References: Carroll 1988, Nowak 1999, Samuels and Van Valkenburgh 2008, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009

Age range: base of the Gelasian to the top of the Irvingtonian or 2.58800 to 0.30000 Ma

Collections (13 total)


Time interval Ma Country or state Original ID and collection number
Blancan4.9 - 1.8USA (Arizona) Sigmodon curtisi (19646 19650 20303)
Blancan4.9 - 1.8Mexico (Sonora) Sigmodon curtisi (20322)
Blancan4.9 - 1.8USA (Colorado) Sigmodon curtisi (19744)
Gelasian2.588 - 1.806USA (Florida) Sigmodon curtisi (20384)
Irvingtonian1.8 - 0.3USA (Kansas) Sigmodon curtisi (20147)
Irvingtonian1.8 - 0.3USA (Texas) Sigmodon curtisi (20164 20337)
Irvingtonian1.8 - 0.3USA (Arizona) Sigmodon curtisi (20341 20344)
Irvingtonian1.8 - 0.3USA (Florida) Sigmodon curtisi (20308 20385)