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Amblotherium gracilis

Mammalia - Dryolestidae

Taxonomy
Stylacodon gracilis was named by Marsh (1879). Its type specimen is YPM 11883, a mandible (left mandible comprising a toothless anterior portion, the impression of the middle portion, and a posterior portion with P4, M1-4, and P3), and it is a 3D body fossil. Its type locality is Quarry 9, Como Bluff (YPM), which is in a Kimmeridgian/Tithonian fluvial-lacustrine mudstone/sandstone in the Morrison Formation of Wyoming.

It was recombined as Amblotherium gracilis by Simpson (1927), Simpson (1929), Kraus (1979), Prothero (1981), Prothero (1981) and Engelmann and Callison (1998); it was misspelled as Amblotherium gracile by Kielan-Jaworowska et al. (2004).

Synonyms
Synonymy list
YearName and author
1879Stylacodon gracilis Marsh
1881Amblotherium debilis Marsh p. 513
1881Dryolestes gracilis Marsh p. 513
1887Laodon venustus Marsh pp. 337-338 figs. Pl. 9:5
1887Dryolestes gracilis Marsh p. 343
1887Stylacodon gracilis Marsh p. 343
1927Amblotherium debilis Simpson p. 412
1927Amblotherium gracilis Simpson p. 412
1929Amblotherium gracilis Simpson p. 66
1929Amblotherium debilis Simpson p. 68
1979Amblotherium debilis Kraus p. 164
1979Amblotherium gracilis Kraus p. 164
1981Amblotherium gracilis Prothero p. 293
1998Amblotherium gracilis Engelmann and Callison p. 368
1998Amblotherium debilis Engelmann and Callison p. 370
2004Amblotherium gracile Kielan-Jaworowska et al. pp. 380, 382-383

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
RankNameAuthor
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes(Rowe 1988)
Trechnotheria
Cladotheria
superorderDryolestoidea(Butler 1939)
familyDryolestidaeMarsh 1879
genusAmblotherium
speciesgracilis(Marsh 1879)

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
No diagnoses are available