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Agnotocastor coloradensis

Osteichthyes - Rodentia - Castoridae

Taxonomy
Agnotocastor coloradensis was named by Wilson (1949). Its type specimen is UCM 19809 and is a 3D body fossil. Its type locality is Cedar Creek (Lower), which is in an Orellan terrestrial horizon in the Brule Formation of Colorado.

Entered
by J. Alroy on 2003-01-23; modified by J. Marcot on 2026-05-02

Synonymy list
YearName and author
1949Agnotocastor coloradensis Wilson p. 32 figs. Plate 1, figures 2, 20
2001Agnotocastor coloradensis Korth p. 45 figs. Figure 2 D-E, 3

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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()
orderRodentia
infraorderCastorimorpha
superfamilyCastoroideaGray 1821
familyCastoridae
genusAgnotocastor
speciescoloradensis

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
W. W. Korth 2001Largest species of the
genus; occlusal pattern of cheek teeth more complex (greater number of fossettes) than in 4. praetereadens; skull proportionally narrower with more elongated rostrum and dorsally arched upper diastema than in A. praetereadens; mandibular diastema deeper than in A.
praetereadens and A. readingi.
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: Lillegraven 1979, Carroll 1988, Hendy et al. 2009, Nowak 1991, Ji et al. 2002

Age range: base of the Orellan to the top of the Geringian or 33.90000 to 24.70000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Orellan33.9 - 31.8USA (Colorado) Agnotocastor coloradensis (type locality: 17081)
Geringian29.5 - 24.7USA (South Dakota) Agnotocastor coloradensis (17653)