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Reigitheriidae

Osteichthyes - Meridiolestida - Reigitheriidae

Synonymy list
YearName and author
1990Reigitheriidae Bonaparte p. 76 fig. 11
2000Reigitheriidae Pascual et al. p. 402
2004Reigitheriidae Kielan-Jaworowska et al. pp. 197, 200
2011Reigitheriidae Rougier et al. p. S12
2018Reigitheriidae Harper et al.
2025Reigitheriidae Püschel et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
RankNameAuthor
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
Cladotheria
Dryolestoidea(Butler 1939)
orderMeridiolestida
Mesungulatoidea
familyReigitheriidae
familyReigitheriidae

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.

Fm. †Reigitheriidae Bonaparte 1990
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G. †Yeutherium Püschel et al. 2025
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Yeutherium pressor Püschel et al. 2025
Diagnosis
ReferenceDiagnosis
H. P. Püschel et al. 2025Small-sized mesungulatoids with seven upper/lower postcanine teeth, instead of six as in mesungulatids. The cingulids in the lower molars are tall and hypertrophied (based on Reigitherium) and the cingula in the upper molars is generally mesially and distally reduced because of expanded preparacristae and postparacristae, presenting a lingual cingulum at the paracone base, unlike mesungulatids that show strongly developed mesial cingula and distal cingula , but lack a lingual
cingulum. Unlike mesungulatids, reigitheriids present interradicular crests linking the roots of the upper molars, a distal accessory root and an ectostyle in the last premolar and first upper molar. Reigitheriids have a variably developed median ridge connecting the paracone and the stylocone, and mesially and distally from it, marked enamel crenulations.