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Dimetrodon grandis

Sphenacodontidae

Taxonomy
Theropleura grandis was named by Case (1907). Its type specimen is AMNH 4034 (not 4130-4134, as erroneously stated by Case, 1907), a set of postcrania (vertebrae and pelvic elements), and it is a 3D body fossil. Its type locality is Beaver Creek, 42 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.

It was recombined as Dimetrodon grandis by Romer and Price (1940) and Reisz (1986).

Synonyms
Synonymy list
YearName and author
1907Theropleura grandis Case p. 28
1930Theropleura grandis Hay p. 50
1936Dimetrodon maximus Romer p. 90
1940Dimetrodon grandis Romer and Price pp. 19, 347
1986Dimetrodon grandis Reisz p. 81

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
suborderEupelycosauria
—SphenacomorphaIvakhnenko 2003
suborderSphenacodontia
—Sphenacodontoidea
familySphenacodontidaeMarsh 1878
subfamilySphenacodontinae
genusDimetrodon
speciesgrandis()

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.

†Dimetrodon grandis Case 1907
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Invalid names: Dimetrodon maximus Romer 1936 [synonym]
Diagnosis
ReferenceDiagnosis
A. S. Romer 1936 (Dimetrodon maximus)The specific characters: the large size and the subquadrate spine section
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 Kungurian to the top of the Leonardian or 279.30000 to 273.01000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Leonardian286.0 - 273.01USA (Oklahoma) Dimetrodon grandis (180990)
Kungurian279.3 - 272.3USA (Texas) Dimetrodon grandis, Theropleura grandis (type locality: 28275)