PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Kayentatherium

Tritylodontidae

Taxonomy

Kayentatherium was named by Kermack (1982). Its type is Kayentatherium wellesi.

It was assigned to Tritylodontidae by Kermack (1982) and Carroll (1988).

Species

K. wellesi (syn. Nearctylodon broomi) (type species)

Synonyms

Nearctylodon was named by Lewis (1986).

It was synonymized subjectively with Kayentatherium by Sues (1986) and Sues et al. (1994).

It was assigned to Tritylodontidae by Lewis (1986).

Synonymy list

Year	Name and author
1982	Kayentatherium Kermack p. 9
1986	Nearctylodon Lewis
1988	Kayentatherium Carroll

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda

Rank	Name	Author
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
family	Tritylodontidae	Cope 1884
genus	Kayentatherium

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.

G. †Kayentatherium Kermack 1982

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†Kayentatherium wellesi Kermack 1982

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Invalid names: Nearctylodon broomi Lewis 1986 [synonym]

Invalid names: Nearctylodon Lewis 1986 [synonym]

Diagnosis

Reference	Diagnosis
D. M. Kermack 1982	A tritylodont having I3 absent; uppr postcanine teeth with only two main cusps in each of three longitudinal rows; small accessory cusp present at the medial end of the central row. Upper postcanine teeth markedly broader than long, breadth/length ratio close to 1.5. Distinguished from all other tritylodonts except Stereognathus by having no more than two principal cusps in each longitudinal row of cusps in the upper postcanine teeth: distinguished from Stereognathus by the much greater breadth/length ratio of these teeth and by the presence of a small accessory cusp in the upper postcanines.

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialuc

Locomotion:

actively mobilec

Created:

2017-04-17 15:15:35

Modified:

2017-04-17 15:15:35

Source: c = class, subp = subphylum, uc = unranked clade

References: Carroll 1988, Hendy et al. 2009

Age range: Sinemurian or 199.30000 to 190.80000 Ma

Collections (9 total)

Time interval	Ma	Country or state	Original ID and collection number
Hettangian - Sinemurian	201.3 - 190.8	USA (Arizona)	K. sp. (214349)
Sinemurian - Pliensbachian	199.3 - 182.7	USA (Arizona)	K. sp. (13280 216631 216637 216645) K. wellesi (46398 137286 137294) Nearctylodon broomi (34533)