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Downsimus rainsi

Osteichthyes - Rodentia - Aplodontidae

Taxonomy
Downsimus rainsi was named by Albright et al. (2026). Its type specimen is MMNS VP-7334, a tooth (right m2), and it is a 3D body fossil. Its type locality is Jones Branch Local Fauna, which is in an Arikareean terrestrial claystone in the Catahoula Formation of Mississippi.

Synonymy list
YearName and author
2026Downsimus rainsi Albright III 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
familyAplodontidaeBrandt 1855
subfamilyProsciurinae
genusDownsimus
speciesrainsi

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.

†Downsimus rainsi Albright III et al. 2026
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: fossorialf
Diet: herbivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-26 12:56:39
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Nowak 1991, Carroll 1988, Ji et al. 2002, Lillegraven 1979

Age range: late Early Arikareean or 29.50000 to 18.50000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
late Early Arikareean29.5 - 18.5USA (Mississippi) Downsimus rainsi (type locality: 277762)