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Cristadjidaumo mckennai

Mammalia - Rodentia - Eomyidae

Taxonomy
Cristadjidaumo mckennai was named by Korth and Eaton (2004). Its type specimen is UMNH VP5656, a tooth (left m2), and it is a 3D body fossil. Its type locality is Turtle Basin, which is in a Duchesnean terrestrial horizon in the "Brian Head" Formation of Utah. It is the type species of Cristadjidaumo.

Synonymy list
YearName and author
2004Cristadjidaumo mckennai Korth and Eaton p. 112 figs. 2A - H

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
RankNameAuthor
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
superfamilyGeomyoideaBonaparte 1845
familyEomyidaeWinge 1887
genusCristadjidaumo
speciesmckennai

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.

Diagnosis
ReferenceDiagnosis
W. W. Korth and J. G. Eaton 2004Differs from most eomyines in that cusps of cheek teeth are less inflated and lophs are thin and well defined, but otherwise retaining primitive occlusal morphology and brachydont cheek teeth. Differs from other lophate eomyines as follows: from Paradjidaumo and Centimanomys by lacking the attachment of the lingual end of the anterior cingulum to the protoconid on lower cheek teeth and lophs (-ids) not as elongated; cheek teeth lower crowned than in Paradjidaumo; from Pseudotheridomys and other later eomyines by the lack of specializations of the occlusal pattern of the cheek teeth (primitive eomyid pattern retained) and lower-crowned cheek teeth. Differs from namatomyines by the possession of a single, central mesoloph (-id) on the molars. Differs from yoderimyines in the following characters: P3 absent; anterior cingulum not attached by anteroposteriorly oriented loph; markedly smaller size.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
Created: 2005-08-26 14:04:46
Modified: 2005-08-26 16:04:46
Source: o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1999, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: Duchesnean or 40.40000 to 37.20000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Duchesnean40.4 - 37.2USA (Utah) Litoyoderimys sp. (type locality: 16877)