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Oligotheriomys senrudi

Osteichthyes - Rodentia - Castoridae

Taxonomy
Monosaulax senrudi was named by Wood 2nd (1945). Its type specimen is AMNH 39415 and is a 3D body fossil.

It was recombined as Hystricops senrudi by Stout and Stone (1971), Cassiliano (1980); it was recombined as Oligotheriomys senrudi by Korth (1998); it was recombined as Priusaulax senrudi by Korth (2017).

Entered
by J. Alroy on 2003-01-23; modified by J. Marcot on 2026-05-18

Synonymy list
YearName and author
1945Monosaulax senrudi Wood 2nd p. 2 figs. Figure 1
1971Hystricops senrudi Stout and Stone
1980Hystricops senrudi Cassiliano
1994Monosaulax senrudi Korth
1998Oligotheriomys senrudi Korth p. 127
2017Priusaulax senrudi Korth p. 253

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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()
orderRodentia
infraorderCastorimorpha
superfamilyCastoroideaGray 1821
familyCastoridae
subfamilyAgnotocastorinae
genusOligotheriomys
speciessenrudi(Wood 1945)

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.

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Diagnosis
ReferenceDiagnosis
H. E. Wood 2nd 1945Size and evolutionary stage intermediate between Monosaulax and Amblycastor; fine, slightly divergent striations on the convex enamel face of 'the incisor; posterior end of incisor definitely lingual to the coronoid process; cheek teeth almost hypsodont; internal end of hypoflexid interpolated between mesofossettid and metafossettid; fossettids (enamel lakes) usually simple and nearly transverse; P4considerablylongerthananyofthe molars,mesio-distally;M2thewidestof thecheekteth,bucco-lingually;M3defi- nitelythesmallestcheektooth;coronoid processmoreprominentanddistinctthan ineitherAmblycastororMonosaulax.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: amphibiousf
Diet: browserf
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-26 13:05:29
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Carroll 1988, Ji et al. 2002, Hendy et al. 2009, Lillegraven 1979

Age range: base of the Hemingfordian to the top of the Middle Miocene or 18.50000 to 11.63000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Hemingfordian18.5 - 16.3USA (Wyoming) Hystricops senrudi (17953)
Middle Miocene15.98 - 11.63USA (Montana) Hystricops senrudi (18887)