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Cymbalophus cuniculus

Mammalia - Perissodactyla

Taxonomy
Hyracotherium cuniculus was named by Owen (1842). Its type specimen is BMNH 36569, a tooth (left M3), and it is a 3D body fossil. Its type locality is Kyson, which is in a Ypresian terrestrial horizon in the Suffolk Pebble Beds Formation of the United Kingdom. It is the type species of Cymbalophus.

It was recombined as Cymbalophus cuniculus by Hooker (1980) and Froehlich (2002).

Synonymy list
YearName and author
1842Hyracotherium cuniculus Owen
1980Cymbalophus cuniculus Hooker
2002Cymbalophus cuniculus Froehlich p. 183

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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
orderPerissodactyla()
suborderLophodontomorpha
infraorderEuperissodactyla
Hippomorpha
superfamilyEquoidea
genusCymbalophus
speciescuniculus(Owen 1842)

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
D. J. Froehlich 2002This taxon has no identified unambiguous autapomorphies but it can be diagnosed by the characters it shares with Systemodon. The synapomorphies include the following characters: upper molar parastyle small (Character 38, 2 to 1), M3 smaller than M2, M3 larger than M2 (Character 67, 2 to 1), P4 entoconid small and variable (Character 75, 2 to 1), and M3 hypoconulid connection forming a triple junction with the prehypoconulid crista (Character 105, 0 to 1). The last of these characters is only found in these two taxa and strongly supports their monophyly. Cymbalophus can be distinguished from Systemodon only on size and geography.