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Amphidon aequicrurius

Mammalia - Symmetrodonta - Amphidontidae

Taxonomy
Amphidon aequicrurius was named by Simpson (1925). Its type specimen is YPM 13639, a maxilla (partial right maxilla with one molar), 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 Eurylambda aequicrurius by Simpson (1929), Cassiliano and Clemens (1979); it was synonymized subjectively with Tinodon bellus by Kielan-Jaworowska et al. (2004).

Synonymy list
YearName and author
1925Amphidon aequicrurius Simpson
1929Eurylambda aequicrurius Simpson pp. 41-42
1930Amphidon aequicrurius Hay p. 371
1979Eurylambda aequicrurius Cassiliano and Clemens p. 151

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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
—Allotheria()
orderSymmetrodontaSimpson 1925
familyAmphidontidae
genusAmphidon
speciesaequicrurius

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.

†Amphidon aequicrurius Simpson 1925
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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, Hendy et al. 2009, 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) Amphidon aequicrurius (type locality: 12816)