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Amblotherium debilis

Osteichthyes - Dryolestidae

Taxonomy
Amblotherium debilis was named by Marsh (1881). Its type specimen is YPM 13728, a mandible (left mandible with M1-6 and roots or alveoli of other teeth), 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 corrected as Amblotherium debile by Hay (1930); it was recombined as Amblotherium debilis by Engelmann and Callison (1998); it was synonymized subjectively with Amblotherium gracile by Kielan-Jaworowska et al. (2004).

Synonyms
  • Dryolestes gracilis was named by Marsh (1881). Its type specimen is YPM 11821, 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 replaced with Amblotherium debilis by Simpson (1927), Simpson (1929); it was replaced with Amblotherium debile by Hay (1930).
Synonymy list
YearName and author
1881Amblotherium debilis Marsh p. 513
1881Dryolestes gracilis Marsh p. 513
1887Dryolestes gracilis Marsh p. 343
1902Dryolestes gracilis Hay p. 569
1927Amblotherium debilis Simpson p. 412
1929Amblotherium debilis Simpson p. 68
1930Amblotherium debile Hay p. 373
1979Amblotherium debilis Kraus p. 164
1998Amblotherium debilis Engelmann and Callison p. 370

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
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
speciesdebilis

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 debilis Marsh 1881
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Invalid names: Dryolestes gracilis Marsh 1881 [replaced]
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: Hopson 1973, Luo et al. 2003, Carroll 1988, Hendy et al. 2009

Age range: base of the Tithonian to the top of the Early/Lower Tithonian or 149.20000 to 145.06000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Kimmeridgian - Tithonian154.8 - 143.1USA (Wyoming) Dryolestes gracilis (type locality: 12816)
Kimmeridgian - Tithonian154.8 - 143.1USA (Utah) Amblotherium debilis (53035)
Late/Upper Kimmeridgian - Early/Lower Tithonian152.21 - 145.06USA (Colorado) Dryolestes gracilis (28366)
Tithonian149.2 - 143.1USA (Wyoming) Amblotherium debilis (39426)