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Thisbemys uintensis

Osteichthyes - Rodentia - Ischyromyidae

Taxonomy
Paramys uintensis was named by Osborn (1895). Its type specimen is AMNH 1901, a set of teeth, and it is a 3D body fossil. Its type locality is Wagonhound Canyon (Uinta B2), which is in an Uintan terrestrial horizon in the Uinta Formation of Utah.

It was recombined as Thisbemys uintensis by Wood (1962), Korth (2020).

Entered
by J. Alroy on 2003-01-23; modified by J. Marcot on 2015-10-31

Synonyms
  • Paramys medius was named by Peterson (1919). Its type specimen is C. M. No. 3048, a partial skull (fragment of maxillary with three teeth and fragment of lower jaw), and it is a 3D body fossil. Its type locality is Myton Pocket, which is in an Uintan terrestrial horizon in the Uinta Formation of Utah.

    It was recombined as Thisbemys medius by Wood (1962); it was synonymized subjectively with Thisbemys uintensis by Korth (2020).
Synonymy list
YearName and author
1895Paramys uintensis Osborn p. 81 fig. 5
1902Paramys uintensis Hay p. 724
1919Paramys medius Peterson p. 61
1962Thisbemys medius Wood
1962Thisbemys uintensis Wood
2020Thisbemys uintensis Korth pp. e1809437-1

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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()
RankNameAuthor
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentia
familyIschyromyidaeAlston 1876
genusThisbemys
speciesuintensis()

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.

†Thisbemys uintensis Osborn 1895
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Invalid names: Thisbemys medius Peterson 1919 [synonym]
Diagnosis
ReferenceDiagnosis
H. F. Osborn 1895Upper molars quinquetubercular with posterior cingulum and a mesostyle. Lower molars quadritubercular. Crown crenulate
W. W. Korth 2020Largest species of the genus; partial hypolophid on lower cheek teeth extending buccally from entoco- nid continuous with posterolophid on p4-m1; short lophule extending lingually from ectolohid on m2 and m3 that joins the buccal end of hypolophid in worn specimens; no mesoconid on p4-m3; i1 only slightly longer than wide in cross section with a flat to nearly flat anterior enamel surface.
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: Ji et al. 2002, Carroll 1988, Lillegraven 1979, Nowak 1999, Hendy et al. 2009

Age range: Uintan or 45.90000 to 39.70000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Uintan45.9 - 39.7USA (Utah) Paramys medius (16607) Thisbemys medius (16589) Thisbemys uintensis (type locality: 16646)