PBDB Taxon

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

Dimetrodon

Sphenacodontidae

Taxonomy

Dimetrodon was named by Cope (1878). It is not extant.

It was assigned to Clepsydropinae by Case (1907); to Clepsydropidae by Cope (1878), Cope (1888), Hay (1902) and Perrier (1928); to Sphenacodontia by Olson (1966); to Sphenacodontinae by Berman (1977) and Reisz (1986); and to Sphenacodontidae by Hay (1930), Romer (1936), Daly (1973), Carroll (1988), Berman et al. (2001) and Martens et al. (2005).

Species

D. angelensis, D. booneorum, D. borealis, D. dollovianus, D. giganhomogenes, D. grandis (syn. D. maximus), D. limbatus (syn. D. incisivus, D. rectiformis, D. semiradicatus), D. loomisi, D. macrospondylus (syn. D. platycentrus), D. milleri, D. natalis, D. occidentalis, D. teutonis

Synonymy list

Year	Name and author
1878	Dimetrodon Cope pp. 512, 529
1888	Dimetrodon Cope p. 287
1902	Dimetrodon Hay p. 432
1907	Dimetrodon Case
1928	Dimetrodon Perrier p. 3085
1930	Dimetrodon Hay p. 53
1936	Dimetrodon Romer p. 90
1966	Dimetrodon Olson p. 302
1973	Dimetrodon Daly p. 587
1977	Dimetrodon Berman p. 108
1986	Dimetrodon Reisz p. 78
1988	Dimetrodon Carroll
2001	Dimetrodon Berman et al. p. 804
2005	Dimetrodon Martens et al.

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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

Rank	Name	Author
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
suborder	Eupelycosauria
—	Sphenacomorpha	Ivakhnenko 2003
suborder	Sphenacodontia
—	Sphenacodontoidea
family	Sphenacodontidae	Marsh 1878
subfamily	Sphenacodontinae
genus	Dimetrodon

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. †Dimetrodon Cope 1878

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†Dimetrodon angelensis Olson 1962

†Dimetrodon booneorum Romer 1937

†Dimetrodon borealis Leidy 1853

†Dimetrodon dollovianus Cope 1888

†Dimetrodon giganhomogenes Case 1907

†Dimetrodon grandis Case 1907

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Invalid names: Dimetrodon maximus Romer 1936 [synonym]

†Dimetrodon limbatus Cope 1877

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Invalid names: Dimetrodon incisivus Cope 1878 [synonym], Dimetrodon rectiformis Cope 1878 [synonym], Dimetrodon semiradicatus Cope 1881 [synonym]

†Dimetrodon loomisi Romer 1937

†Dimetrodon macrospondylus Cope 1884

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Invalid names: Dimetrodon platycentrus Case 1907 [synonym]

†Dimetrodon milleri Romer 1937

†Dimetrodon natalis Cope 1878

†Dimetrodon occidentalis Berman 1977

†Dimetrodon teutonis Berman et al. 2001

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialuc

Locomotion:

actively mobilec

Created:

2017-04-17 15:15:35

Modified:

2017-04-17 15:15:35

Source: c = class, subp = subphylum, uc = unranked clade

References: Hendy et al. 2009, Carroll 1988

Age range: base of the Asselian to the top of the Leonardian or 298.90000 to 273.01000 Ma

Collections (81 total)

Time interval	Ma	Country or state	Original ID and collection number
Asselian	298.9 - 295.5	USA (Texas)	D. sp. (173721 207496)
Asselian - Sakmarian	298.9 - 290.1	USA (Texas)	D. natalis (11165) D. sp. (113555)
Wolfcampian	298.9 - 286.0	USA (Texas)	D. limbatus (180978) D. milleri (79162)
Wolfcampian	298.9 - 286.0	USA (New Mexico)	D. limbatus (181037) D. occidentalis (28067) D. occidentalis, D. occidentalis (180974) D. sp. (181078)
Permian	298.9 - 251.902	USA (Oklahoma)	D. limbatus (221391 221392)
Sakmarian	293.52 - 290.1	USA (Texas)	D. incisivus (28124) D. sp. (28120 28123 28125)
Sakmarian - Artinskian	293.52 - 279.3	USA (Texas)	D. sp. (28324)
Artinskian	290.1 - 279.3	USA (Texas)	Clepsydrops macrospondylus (28238) Clepsydrops natalis, Clepsydrops limbatus, D. semiradicatus (108766) Clepsydrops natalis, D. rectiformis (28142) D. booneorum (13080) D. milleri (84716) D. sp. (22714 28141 28143 28144 28145 28146 28147 28148 28150 28239 28240)
Artinskian	290.1 - 279.3	Canada (Prince Edward Island)	Bathygnathus borealis (48897)
Artinskian	290.1 - 279.3	USA (Oklahoma)	D. sp. (67862 79402 220872)
Artinskian	290.1 - 279.3	Germany (Thuringia)	D. teutonis (80112)
Artinskian - Kungurian	290.1 - 272.3	USA (Oklahoma)	D. dollovianus, D. macrospondylus, D. platycentrus (85733)
Artinskian - Kungurian	290.1 - 272.3	USA (Texas)	D. semiradicatus (28253) D. sp. (28241 28242 28249 28250 28252 85299 85300 85301)
Artinskian - Roadian	290.1 - 268.8	USA (Texas)	D. sp. (180992)
Leonardian	286.0 - 273.01	USA (Oklahoma)	D. grandis, D. giganhomogenes (180990) D. limbatus (85567 180991) D. sp. (79815 84941 87054)
Leonardian	286.0 - 273.01	USA (Texas)	D. gigashomogenes (85362)
Kungurian	279.3 - 272.3	USA (Oklahoma)	D. loomisi (67945) D. sp. (79602)
Kungurian	279.3 - 272.3	USA (Texas)	Clepsydrops natalis, D. incisivus, D. loomisi (28267) D. gigashomogenes (12976 27704 85553 177000 177003 177014 177017 177019 178738) D. loomisi, D. gigashomogenes, Embolophorus dollovianus (28256) D. sp. (28251 28261 28264 28270 67735 67737 85551 85552 85554) D. sp., D. grandis, Theropleura grandis (28275)
Kungurian - Roadian	279.3 - 268.8	USA (Texas)	D. angelensis (80689 85170)