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Bryceomys intermedius

Mammalia - Multituberculata

Taxonomy
Bryceomys intermedius was named by Eaton and Cifelli (2001). Its type specimen is OMNH 33001, a tooth (m1), and it is a 3D body fossil. Its type locality is OMNH V868, Mussentuchit , which is in a Cenomanian crevasse splay horizon in the Cedar Mountain Formation of Utah.

Synonymy list
YearName and author
2001Bryceomys intermedius Eaton and Cifelli pp. 478-483 figs. 9-10
2004Bryceomys intermedius Kielan-Jaworowska et al. pp. 254, 321

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
RankNameAuthor
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Allotheria()
orderMultituberculataCope 1884
suborderCimolodonta()
genusBryceomys
speciesintermedius

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.

†Bryceomys intermedius Eaton and Cifelli 2001
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Diagnosis
ReferenceDiagnosis
J. G. Eaton and R. L. Cifelli 2001Intermediate in size between Bryceomys fumosus and B. hadrosus, and morphologically between Cedaromys and other species of Bryceomys; p4 with a distinct and widely separated first serration as in Cedaromys, but not later species of Bryceomys, and H:L (0.58) ratio closer to later species of Bryceomys (0.56) than in Cedaromys (20.60). P4 with large anterior notch for P3, as in Cedaromys, but with a cusp formula (25) as in Bryceomys. Molars narrower relative to width than in Cedaromys, but not as narrow as later species of Bryceomys. M1 with wide, long (~50% of tooth length) internal (3rd) cusp row, unlike species of Cedaromys, Paracimexomys, cf. Paracimexomys, or Dakotamys.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: arborealo
Diet: herbivoreo
Created: 2005-09-01 17:42:57
Modified: 2005-09-01 19:42:57
Source: o = order, c = class, subp = subphylum
References: Hendy et al. 2009, Hopson 1973, Jenkins and Krause 1983, Carroll 1988

Age range: Early/Lower Cenomanian or 99.60000 to 93.50000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Albian - Early/Lower Cenomanian105.3 - 93.5USA (Idaho) Bryceomys intermedius (201911)
Early/Lower Cenomanian99.6 - 93.5USA (Utah) Bryceomys intermedius (14396 14398 14399 14403 type locality: 14405 206748) Paracimexomys sp. A (14395)