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Microsteiromys

Osteichthyes - Rodentia - Erethizontidae

Discussion

Etymology: In reference to its small size and general resemblance to Santacrucian genuns Steiromys Ameghino1887

Taxonomy
Microsteiromys was named by Walton (1990).

It was assigned to Erethizontidae by Walton (1990).

Species
M. jacobsi

Synonymy list
YearName and author
1990Microsteiromys Walton

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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()
—Mammaliamorpha
RankNameAuthor
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
—CtenohystricaHuchon et al. 2000
infraorderHystricognathi(Tullberg 1899)
—Caviomorpha(Wood and Patterson 1955)
superfamilyErethizontoideaBonaparte 1845
familyErethizontidaeBonaparte 1845
genusMicrosteiromys

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. †Microsteiromys Walton 1990
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†Microsteiromys jacobsi Walton 1990
Diagnosis
ReferenceDiagnosis
A. H. Walton 1990Samall erethizontid. Lower incisor with rounded face. Lingual flexids on lower cheek teeth close to form fossetids. Dp4 narrow, p4 molariform. Anterior root on p4 robust. Genioglossal fossa deep. Mandible otherwise generalized.