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Amblotherium megistodon

Mammalia - Dryolestidae

Taxonomy
Amblotherium megistodon was named by Foster et al. (2020). Its type specimen is SDSM 148545, a mandible (L dentary preserved in labial view with p2–p4 and m1–m3 in place), and it is a 3D body fossil. Its type locality is Little Houston Quarry (SDSM V9138, SDSM V941), which is in a Kimmeridgian/Tithonian pond mudstone/siltstone in the Morrison Formation of Wyoming.

Synonymy list
YearName and author
2020Amblotherium megistodon Foster et al. p. 54 fig. 19

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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
superorderDryolestoidea(Butler 1939)
familyDryolestidaeMarsh 1879
genusAmblotherium
speciesmegistodon

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.

†Amblotherium megistodon Foster et al. 2020
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Diagnosis
ReferenceDiagnosis
J. R. Foster et al. 2020Amblotherium species with isometrically larger dentary and teeth than other species of the genus (m3 up to 87% longer than in other species; 1.5 mm mesiodistal length compared with average of 0.80 mm in A. pusillum and A. gracile) and differing from other species of the genus in having roots of unequal size in m1 and m2 as well as more distal molars; other characters match generic diagnosis of Amblotherium.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialc
Locomotion: actively mobilec
Life habit: scansorialuc
Diet: insectivoreuc
Created: 2005-09-06 19:53:51
Modified: 2005-09-07 19:44:02
Source: c = class, subp = subphylum, uc = unranked clade
References: Luo et al. 2003, Hendy et al. 2009, Hopson 1973, Carroll 1988

Age range: base of the Kimmeridgian to the top of the Tithonian or 157.30000 to 145.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Kimmeridgian - Tithonian157.3 - 145.0USA (Wyoming) Amblotherium megistodon (type locality: 49636)