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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), Hay (1930), 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 p. 61
1887Laodon venustus Marsh pp. 337-338
1887Stylacodon gracilis Marsh p. 343
1897Stylacodon gracilis Marsh p. 508
1902Stylacodon gracilis Hay p. 569
1902Laodon venustus Hay p. 570
1927Amblotherium gracilis Simpson p. 412
1929Amblotherium gracilis Simpson p. 66
1930Amblotherium gracilis Hay p. 373
1979Amblotherium gracilis Kraus p. 164
1981Amblotherium gracilis Prothero p. 293
1998Amblotherium gracilis Engelmann and Callison p. 368
2004Amblotherium gracile Kielan-Jaworowska et al. pp. 380, 382-383

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
RankNameAuthor
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Dryolestoidea(Butler 1939)
familyDryolestidaeMarsh 1879
genusAmblotherium
speciesgracilis()

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 gracilis Marsh 1879
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Invalid names: Laodon venustus Marsh 1887 [synonym]
Diagnosis
No diagnoses are available
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 (3 total)


Time interval Ma Country or state Original ID and collection number
Kimmeridgian - Tithonian157.3 - 145.0USA (Utah) Amblotherium gracilis (53035)
Kimmeridgian - Tithonian157.3 - 145.0USA (Wyoming) Amblotherium gracilis (39431) Laodon venustus, Stylacodon gracilis (type locality: 12816)