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Onychomys bensoni

Mammalia - Rodentia - Cricetidae

Taxonomy
Onychomys bensoni was named by Gidley (1922). Its type specimen is USNM 10509, a mandible (Portion- of a right lower jaw containing complete dentition), and it is a 3D body fossil.

Sister species lacking formal opinion data
O. larabeei

Synonymy list
YearName and author
1922Onychomys bensoni Gidley p. 125

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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()
—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
genusOnychomysBaird 1858
speciesbensoni

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.

†Onychomys bensoni Gidley 1922
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Diagnosis
ReferenceDiagnosis
J. W. Gidley 1922Length of the cheek-tooth series 3.9 millimeters; about the size of O. torridus but with less reduced last molar, as in the larger species O. leu. ruidosae. The hinder lobe of the last molar is less reduced even than in the last-mentioned species. O. bensoni differs from all the living species of the genus in having more widely open valleys and less conspicuous lophs in the molar teeth; a more depressed heel on the last lower molar, which is distinctly lower than the anterior or triconid portion; and apparently a relatively larger and higher coronoid process.