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Downsimus

Mammalia - Rodentia - Allomyidae

Taxonomy
Downsimus was named by Macdonald (1970). It is not extant. Its type is Downsimus chadwicki.

It was assigned to Allomyidae by Macdonald (1970) and McKenna and Bell (1997).

Species
D. chadwicki (syn. Allomys sharpi) (type species)

Synonymy list
YearName and author
1970Downsimus Macdonald
1997Downsimus McKenna and Bell

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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
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
familyAllomyidaeMarsh 1877
genusDownsimus

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. †Downsimus Macdonald 1970
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†Downsimus chadwicki Macdonald 1970
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Invalid names: Allomys sharpi Macdonald 1970 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2005-08-26 14:04:46
Modified: 2005-08-26 16:04:46
Source: o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1999, Hendy et al. 2009, Lillegraven 1979, Ji et al. 2002, Carroll 1988

Age range: base of the Arikareean to the top of the Monroecreekian or 29.50000 to 24.80000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Geringian30.8 - 26.3USA (South Dakota) Allomys sharpi (17637) D. chadwicki (17644)
Geringian30.8 - 26.3USA (Nebraska) D. chadwicki (17544 17709)
Arikareean29.5 - 18.5USA (Montana) D. sp. (17540)
early Early Arikareean29.5 - 18.5USA (Nebraska) D. chadwicki (156729)
Monroecreekian26.3 - 24.8Canada (Saskatchewan) Allomys sp. (17526)