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Durlstodon

Mammalia

Taxonomy
Durlstodon was named by Sweetman et al. (2017). Its type is Durlstodon ensomi.

It was assigned to Eutheria by Sweetman et al. (2017).

Species
D. ensomi (type species)

Synonymy list
YearName and author
2017Durlstodon Sweetman et al. figs. Figs. 3–6

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
RankNameAuthor
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
genusDurlstodon

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. †Durlstodon Sweetman et al. 2017
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Durlstodon ensomi Sweetman et al. 2017
Diagnosis
ReferenceDiagnosis
S. C. Sweetman et al. 2017Monotypic tribosphenic mammal with a unique combination of derived characters. Differs from stem therians including Juramaia and Acristotherium, from the Oxfordian and Barremian of China respectively, but resembles Late Cretaceous eutherians, particularly members of Zhelestidae (sensu Archibald and Averianov 2012) in: height and expan- sion of the protocone relative to labial cusps; possession of conules placed labially immediately adjacent to the paracone and metacone with sharp internal cristae; protocone antero- posteriorly expanded and similar in height to the metacone; conular region width more than 51% of the total molar width (c. 64%); lower molars with a substantial entoconid as evidenced by a wear facet on the distal side of the protocone. Differs from members of Zhelestidae in possession of a paracone that is substantially taller than the protocone and metacone. Differs from Durlstotherium gen. nov. in: the presence of a rectangular trigon basin with internal conular cristae rather than a triangular trigon basin lacking these; in the more expanded protocone lacking any apical constriction; in presence of an angled postprotocrista (exaggerated by wear); in possession of an apparently more robust paraconule (possibly exaggerated by wear); in greater separation and relative sizes of the paracone and metacone; possession of a cuspidate ectocinglum; absence of pre- and postcingulum; pattern of wear (see below); and greater size. Other characters cannot be determined due to loss of the mesiolabial corner of the tooth.