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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).

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

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
RankNameAuthor
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
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.

Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
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, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: base of the Geringian to the top of the Monroecreekian or 30.80000 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)
Arikareean30.8 - 20.43USA (Montana) D. sp. (17540)
early Early Arikareean30.8 - 20.43USA (Nebraska) D. chadwicki (156729)
Monroecreekian26.3 - 24.8Canada (Saskatchewan) Allomys sp. (17526)