PBDB Taxon

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

Dystrophaeus

Osteichthyes

Taxonomy

Dystrophaeus was named by Cope (1877). Its type is Dystrophaeus viaemalae. It is the type genus of Dystrophaeidae.

It was synonymized subjectively with Camarasaurus by Madsen and Miller (1979).

It was assigned to Dinosauria by Cope (1877); to Atlantosauridae by Sauvage (1882), Dollo (1884); to Stegosauria by Zittel (1890); to Stegosauria by Winkler (1893); to Orthopoda by Huene (1902); to Stegosauridae by Marsh (1895), Marsh (1896), Nopcsa (1901), Hay (1902); to Dystrophaeidae by Huene (1904); to Cetiosauridae by Huene (1908), Huene (1908), Huene (1909), von Zittel (1911), Lull (1924); to Camarasaurinae by Nopcsa (1928); to Cardiodontinae by Huene (1927), Huene (1927), Huene (1929); to Brachiosauridae by Romer (1966); to Cetiosaurinae by Romer (1956), Steel (1970); to Diplodocinae by McIntosh (1990); to Sauropoda by Cope (1877), Carroll (1988), Gillette (1993), Upchurch et al. (2004); to Sauropoda by Hay (1930), Tatarinov (1964), Chure et al. (2006); and to Eusauropoda by Wilson (2002), Tschopp et al. (2015).

Species

D. viaemalae (type species)

Synonymy list

Year	Name and author
1877	Dystrophaeus Cope
1882	Dystrophaeus Sauvage p. 35
1884	Dystrophaeus Dollo p. 298
1890	Dystrophaeus Zittel p. 749
1893	Dystrophaeus Winkler p. 105
1895	Dystrophaeus Marsh
1896	Dystrophaeus Marsh p. 195
1901	Dystrophaeus Nopcsa p. 213
1902	Dystrophaeus Hay p. 497
1902	Dystrophaeus Huene
1904	Dystrophaeus Huene p. 331
1908	Dystrophaeus Huene p. 296
1909	Dystrophaeus Huene p. 14
1911	Distrophaeus von Zittel p. 285
1924	Distrophaeus Lull p. 234
1927	Dystrophaeus Huene p. 122
1928	Dystrophaeus Nopcsa p. 184
1929	Dystrophaeus Huene p. 115
1930	Dystrophaeus Hay p. 201
1956	Dystrophaeus Romer p. 620
1964	Dystrophaeus Tatarinov p. 549
1966	Dystrophaeus Romer p. 370
1970	Dystrophaeus Steel p. 65
1988	Dystrophaeus Carroll
1990	Dystrophaeus McIntosh p. 391
1993	Dystrophaeus Gillette p. 37A
2002	Dystrophaeus Wilson p. 248
2004	Dystrophaeus Upchurch et al. p. 261
2006	Dystrophaeus Chure et al. p. 236
2015	Dystrophaeus Tschopp et al.

Is something missing? Join the Paleobiology Database and enter the data

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

Rank	Name	Author
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Saurischia	()
—	Eusaurischia
—	Sauropodomorpha	(Huene 1932)
—	Massopoda
—	Sauropodiformes
—	Sauropoda	()
—	Gravisauria
—	Eusauropoda
genus	Dystrophaeus

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. †Dystrophaeus Cope 1877

show all | hide all

†Dystrophaeus viaemalae Cope 1877

Diagnosis

No diagnoses are available

Measurements

part	N	mean
? ulna diameter	1	150.0

Composition:

hydroxyapatiteinfrao

Entire body:

yesinfrao

Adult length:

10 to < 100infrao

Adult width:

10 to < 100infrao

Adult height:

10 to < 100infrao

Thickness:

thickinfrao

Architecture:

compact or denseinfrao

Form:

sphericalinfrao

Ontogeny:

accretion, modification of partsinfrao

Grouping:

gregariousinfrao

Environment:

terrestrialinfrao

Locomotion:

actively mobileinfrao

Life habit:

ground dwellinginfrao

Diet:

herbivoreinfrao

Reproduction:

oviparousinfrao

Dispersal:

direct/internalinfrao

Dispersal 2:

mobileinfrao

Created:

2004-12-14 12:49:10

Modified:

2004-12-14 14:49:10

Source: infrao = infraorder

References: Marsh 1875, Kiessling 2004

Age range: Late/Upper Oxfordian or 157.90000 to 154.80000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Oxfordian	157.9 - 154.8	USA (Utah)	D. viaemalae (28360)