PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Stegomastodon

Mammalia - Proboscidea - Gomphotheriidae

Taxonomy

Stegomastodon was named by Pohlig (1912). It is not extant.

It was assigned to Cuvieroniini by McKenna and Bell (1997); to Anancinae by Zurita et al. (2004); to Cuvieroniinae by Shoshani and Tassy (1996) and Shoshani and Tassy (2005); and to Gomphotheriidae by Pohlig (1912), Kurten and Anderson (1980), Carroll (1988), Lambert and Shoshani (1998) and Salles et al. (2006).

Species

S. aftoniae, S. brasiliensis, S. chapmani (syn. Mastodon chapmani), S. mirificus (syn. S. rexroadensis, S. texanus, Mastodon successor, S. arizonae), S. nebrascensis, S. primitivus

Synonyms

Rhabdobunus was named by Hay (1914). It is not extant.

It was synonymized subjectively with Tetralophodon by Osborn (1918); it was synonymized subjectively with Stegomastodon by Matthew (1918), Osborn (1924) and Lambert and Shoshani (1998).

Synonymy list

Year	Name and author
1912	Stegomastodon Pohlig
1914	Rhabdobunus Hay
1980	Stegomastodon Kurten and Anderson p. 346
1988	Stegomastodon Carroll
1996	Stegomastodon Shoshani and Tassy p. 352
1997	Stegomastodon McKenna and Bell p. 502
1998	Stegomastodon Lambert and Shoshani p. 613
2004	Stegomastodon Zurita et al.
2005	Stegomastodon Shoshani and Tassy p. 9 figs. Table 2
2006	Stegomastodon Salles et al. p. 8

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota

Rank	Name	Author
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Afrotheria	Stanhope et al. 1998
—	Tethytheria
order	Proboscidea	()
family	Gomphotheriidae	Hay 1922
genus	Stegomastodon	Pohlig 1912

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.

G. †Stegomastodon Pohlig 1912

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†Stegomastodon aftoniae Osborn 1924

†Stegomastodon brasiliensis Lund 1839

†Stegomastodon chapmani Osborn 1924

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Invalid names: Mastodon chapmani Hays 1834 [objective synonym]

†Stegomastodon mirificus Leidy 1858

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Invalid names: Mastodon successor Cope 1892 [synonym], Stegomastodon arizonae Gidley 1926 [synonym], Stegomastodon rexroadensis Woodburne 1961 [synonym], Stegomastodon texanus Osborn 1924 [synonym]

†Stegomastodon nebrascensis Osborn 1924

†Stegomastodon primitivus Osborn 1936

Invalid names: Rhabdobunus Hay 1914 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

ground dwellingg

Diet:

grazerg

Reproduction:

viviparoussubc

Created:

2005-08-31 15:17:17

Modified:

2005-08-31 17:17:17

Source: g = genus, subc = subclass, c = class, subp = subphylum

References: Lambert and Shoshani 1998, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Carroll 1988

Age range: base of the Hemphillian to the top of the Lujanian or 10.30000 to 0.01200 Ma

Collections (56 total)

Time interval	Ma	Country or state	Original ID and collection number
Hemphillian	10.3 - 4.9	USA (Nebraska)	S. nebrascensis (18033)
Late/Upper Hemphillian	10.3 - 4.9	Mexico (Guanajuato)	S. sp. (18738)
Late/Upper Hemphillian	10.3 - 4.9	Mexico (Chihuahua)	S. sp. (18755)
Blancan	4.9 - 1.8	USA (Idaho)	S. mirificus (19768 19911 19913) S. sp. (19918)
Blancan	4.9 - 1.8	USA (Nebraska)	S. mirificus (19955) S. primitivus (19963) S. sp. (19954)
Blancan	4.9 - 1.8	USA (New Mexico)	S. mirificus (19655 19976 19984) S. rexroadensis (19974) S. sp. (19968 19982)
Blancan	4.9 - 1.8	USA (Kansas)	S. mirificus (19939) S. rexroadensis (19936 19940) S. sp. (19924 19929 19951) S. successor (19932)
Blancan	4.9 - 1.8	USA (South Dakota)	S. sp. (20019)
Blancan	4.9 - 1.8	USA (Texas)	S. mirificus (20030 20033) S. sp. (20022 20025 20028 20035 207491 207492)
Blancan	4.9 - 1.8	USA (Arizona)	S. mirificus (19654) S. sp. (19618 19645 19650 20303)
Blancan	4.9 - 1.8	Mexico (Chihuahua)	S. sp. (20074)
Blancan	4.9 - 1.8	Mexico (Jalisco)	S. primitivus (204315)
Blancan	4.9 - 1.8	USA (California)	S. arizonae (19668)
Blancan - Irvingtonian	4.9 - 0.3	USA (South Dakota)	S. mirificus (20020)
Late/Upper Pliocene	3.6 - 2.588	USA (Texas)	S. sp. (207488) S. sp., Mastodon successor (191451)
Piacenzian	3.6 - 2.588	USA (California)	S. sp. (19703)
Early/Lower Pleistocene	2.588 - 0.781	USA (Iowa)	S. aftoniae (93136)
Pleistocene	2.588 - 0.0117	USA (Nebraska)	Mastodon mirificus (234742)
Irvingtonian	1.8 - 0.3	USA (New Mexico)	S. sp. (20396)
Irvingtonian	1.8 - 0.3	USA (California)	S. sp. (20128)
Irvingtonian	1.8 - 0.3	USA (Nebraska)	S. sp. (20523)
Irvingtonian	1.8 - 0.3	USA (Arizona)	S. sp. (20341)
Irvingtonian	1.8 - 0.3	USA (Texas)	S. sp. (20164)
Lujanian	0.781 - 0.012	Argentina (Corrientes)	S. sp. (71289 71290)
Middle Pleistocene	0.774 - 0.129	USA (Nebraska)	S. aftoniae (34382)
Late/Upper Pleistocene	0.129 - 0.0117	Uruguay	S. sp. (211646)
Late/Upper Pleistocene	0.129 - 0.0117	Nicaragua	S. sp. (71267)