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Ticholeptus

Mammalia - Artiodactyla - Merycoidodontidae

Taxonomy
Ticholeptus was named by Cope (1878). Its type is Ticholeptus zygomaticus.

It was synonymized subjectively with Merychyus by Cope (1884), Scott (1890) and Scott (1893).

It was assigned to Merycoidodontidae by Cope (1878), Thorpe (1937), Kelly and Lander (1988) and Lander (1998); and to Ticholeptinae by Schultz and Falkenbach (1941) and Stevens and Stevens (2007).

Synonyms
Synonymy list
YearName and author
1878Ticholeptus Cope
1903Poatrephes Douglass
1937Ticholeptus Thorpe
1941Ticholeptus Schultz and Falkenbach p. 72
1988Ticholeptus Kelly and Lander
1998Ticholeptus Lander
2007Ticholeptus Stevens and Stevens p. 163

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
RankNameAuthor
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderArtiodactyla()
suborderTylopoda()
superfamilyOreodontoidea
familyMerycoidodontidaeThorpe 1923
subfamilyTicholeptinae
genusTicholeptus

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
C. B. Schultz and C. H. Falkenbach 1941SKULL.-Medium-sized, ranging in length from approximately 210 mm. to 250 mm.; mesocephalic to brachycephalic; occipital region fan-shaped, similar to that of Ustatochoerus; brain case inflated; malar prominent anterior to orbit (starting above posterior premolar region), causing a broad facial depression in the lacrimal region embracing the facial vacuity; zygomatic arch of light con- struction; nasals moderately long with slight retraction; infraorbital foramen above PLP 4 ; muzzle square and broad; occipital condyles light; postglenoid processes large and more robust than in Ustatochoerus; bullre semi-depressed, similar to those of Ustatochoerus.
MANDIBLE.-Medium-sized; Werior border of ramus similar to that of Ustatochoerus; inferior region of angle with pronounced internal curve.
DENTITION.-Slightly hypsodont; lighter than in Ustatochoerus and not as hypsodont; small cusp on interior-posterior portion of pa; inferior premolars not as crowded as in Ustatochoerus; M1 small; pronounced heel on Ma.
LIMBS.-Known only from referred examples of T. hypsodus and from partial limbs of the holotypes of T. rileyi and T. tooheyi; proportionately lighter than Brachycrus and Ustatochoerus; decidedly longer and more robust than in Merychyus.