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Durlstotherium newmani
Taxonomy
Durlstotherium newmani was named by Sweetman et al. (2017). Its type specimen is NHMUI PV M 99991, a tooth, and it is a 3D body fossil. Its type locality is Mammal Bed, Durlston Bay (DB83), which is in a Berriasian marine horizon in the Lulworth Formation of the United Kingdom. It is the type species of Durlstotherium.
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Durlstotherium newmani Sweetman et al. |
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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.
†Durlstotherium newmani Sweetman et al. 2017
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. C. Sweetman et al. 2017 | Monotypic tribosphenic mammal with a unique combination of derived dental characters. Differs from stem therians including Juramaia and Acristotherium, from the Oxfordian and Barremian of China respectively, but resembles Late Cretaceous eutherians, particularly asioryctitheres, cimolestids, and gypsonictopsids in: height and expansion of the protocone relative to labial cusps; possession of conules placed labially immediately adjacent to the paracone and metacone with sharp internal cristae and distance between conules as a percentage of total tooth length >31% <50% (44%) (Luo et al. 2003, 2011). Differs from Prokennalestes from the Aptian–Albian of Mongolia in the presence of a pre- and postcingulum. Resembles Gypsonictops from the Late Cretaceous of North America in the presence of strong cingulae but differs from it in lack of a hypocone. Also differs from it in having a more connate paracone. Resembles members of Asioryctidae in the presence of a transversely elongate crown but dif- fers from them in presence of strongly developed cingulae. Also differs from Asioryctes from the Late Cretaceous of Mongolia in presence of a metaconule. Resembles members of Kennalestidae in the presence of cingulae but differs from them in the presence of a preparastyle. Resembles members of Cimolestidae, which possess anteroposteriorly short and transversely broad upper molars with an anteroposteriorly compresed protocone and a paracone that is much taller than the metacone, but differs in the presence of a pre- and postcingulum which are either weak or lacking in members of Cimolestidae. |
Measurements
No measurements are available
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| Source: subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Carroll 1988, Ji et al. 2002, Hendy et al. 2009 | |||||
Age range: Middle Berriasian or 145.00000 to 140.20000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Berriasian | United Kingdom (England) | Durlstotherium newmani (type locality: 72142) |