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Mammut pacificus
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
| Year | Name and author |
|---|---|
| 2019 | Mammut pacificus Dooley et al. p. 4 figs. Figs. 1-5 |
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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
| Reference | Diagnosis | |
|---|---|---|
| A. C. Dooley et al. 2019 | A 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
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| Source: g = genus, subc = subclass, c = class, subp = subphylum | |||||
| References: Lambert and Shoshani 1998, Hendy et al. 2009, Carroll 1988, Ji et al. 2002, Lillegraven 1979 | |||||
Age range: base of the Pleistocene to the top of the Rancholabrean or 2.58800 to 0.01200 Ma
Collections (38 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Blancan | USA (California) | Mammut americanum (19663) | |
| Pleistocene | USA (California) | Mammut americanum (65994 65995) | |
| Irvingtonian | USA (California) | Mammut americanum (20125 20128 20454) Mammut pacificus (20425) | |
| Irvingtonian - Rancholabrean | USA (California) | Mammut americanum (20323) | |
| Rancholabrean | USA (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) | |
| Rancholabrean | USA (Idaho) | Mammut pacificus (200341) | |
| Late/Upper Pleistocene (interglacial) | USA (Idaho) | Mammut americanum (20569) | |
| Late/Upper Pleistocene (glacial) | USA (California) | Mastodon americanus (155393) | |
| Late/Upper Pleistocene (interglacial) | USA (California) | Mammut americanum (20585) | |
| Late/Upper Pleistocene | USA (California) | Mammut americanum (73752) Mammut pacificus (79630) | |
| Late/Upper Pleistocene | USA (Oregon) | Mammut americanum (238064) |