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Mammut pacificus

Mammalia - Proboscidea - Mammutidae

Taxonomy
Mammut pacificus was named by Dooley et al. (2019). Its type specimen is WSC 18743, a partial skeleton (Partial skeleton including largely complete cranium and mandible, with left and right M2/m2 and M3/m3, complete right tusk, distal 1/3 of left tusk, nearly comp), and it is a 3D body fossil. Its type locality is Diamond Valley Lake West Dam, which is in a Rancholabrean terrestrial horizon in California.

Sister species lacking formal opinion data

Synonymy list
YearName and author
2019Mammut pacificus Dooley et al. p. 4 figs. Figs. 1-5

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
RankNameAuthor
Mammaliamorpha
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
AfrotheriaStanhope et al. 1998
Tethytheria
orderProboscidea()
suborderElephantiformesTassy 1988
ElephantimorphaTassy and Shoshani 1997
MammutidaTassy and Shoshani 1997
familyMammutidaeHay 1922
genusMammutBlumenbach 1799
speciespacificus

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.

Mammut pacificus Dooley et al. 2019
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Diagnosis
ReferenceDiagnosis
A. C. Dooley et al. 2019A species of Mammut differing from Mammut americanum in the following characteristics: M3/m3 significantly narrower relative to length; six fused sacral vertebrae in later ontogenetic stages (usually five in M. americanum, with a range of four to six); femur with a greater midshaft diameter relative to length; absence of mandibular
tusks and associated alveoli (variably present in M. americanum); smaller basal diameter of tusks in males for a given age.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingg
Diet: browserg
Reproduction: viviparoussubc
Created: 2005-08-31 15:16:05
Modified: 2009-01-04 12:24:42
Source: g = genus, subc = subclass, c = class, subp = subphylum
References: Lambert and Shoshani 1998, Lillegraven 1979, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: base of the Pleistocene to the top of the Rancholabrean or 2.58800 to 0.01200 Ma

Collections (37 total)


Time interval Ma Country or state Original ID and collection number
Blancan4.9 - 1.8USA (California) Mammut americanum (19663)
Pleistocene2.588 - 0.0117USA (California) Mammut americanum (65994 65995)
Irvingtonian1.8 - 0.3USA (California) Mammut americanum (20125 20128 20454) Mammut pacificus (20425)
Irvingtonian - Rancholabrean1.8 - 0.012USA (California) Mammut americanum (20323)
Rancholabrean0.3 - 0.012USA (California) Mammut pacificus (196762 type locality: 200313 200314 200315 200316 200317 200318 200319 200321 200322 200323 200326 200327 200328 200329 200330 200331 200332 200333 200336 200338 200339 200340)
Rancholabrean0.3 - 0.012USA (Idaho) Mammut pacificus (200341)
Late/Upper Pleistocene0.126 - 0.0117USA (California) Mammut americanum (73752) Mammut pacificus (79630)
Late/Upper Pleistocene (interglacial)0.126 - 0.0117USA (California) Mammut americanum (20585)
Late/Upper Pleistocene (glacial)0.126 - 0.0117USA (California) Mastodon americanus (155393)
Late/Upper Pleistocene (interglacial)0.126 - 0.0117USA (Idaho) Mammut americanum (20569)