PBDB Taxon

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Thecodontosauridae

Reptilia - Thecodontosauridae

Taxonomy

Thecodontosauridae was named by Lydekker (1890). Its type is Thecodontosaurus.

It was synonymized subjectively with Anchisauridae by von Zittel (1911), Das-Gupta (1930), Kuhn (1966), Steel (1970), Benedetto (1973), Galton (1973), Heerden (1979), Benton (1979) and Cooper (1981); it was synonymized subjectively with Zanclodontidae by Hay (1930).

It was assigned to Theropoda by Lydekker (1893) and Huene (1908); to Saurischia by Arldt (1909) and Huene (1909); to Pachypodosauria by Huene (1914), Huene (1914), Huene (1920) and Nopcsa (1923); to Pachypodosauroidea by Nopcsa (1928); to Prosauropoda by Kuhn (1946) and Parsch (1963); to Prosauropoda by Tatarinov (1964); to Plateosauria by Ellenberger et al. (1970); to Plateosauria by Colbert (1964) and Colbert (1970); to Palaeopoda by Reig (1970); to Prosauropoda by Huene (1929), Young (1942), Huene (1948), Haughton and Brink (1954), Romer (1956), Huene (1959), Romer (1966), Charig (1967), Swinton (1970), Kuhn (1971), Bonaparte (1971) and Rozhdestvensky (1977); and to Sauropodomorpha by Benton et al. (2000).

Subtaxa

Pseudotrisauropus, Trichristolopus

Synonymy list

Year	Name and author
1890	Thecodontosauridae Lydekker
1893	Thecodontosauridae Lydekker pp. 285-286
1908	Thecodontosauridae Huene p. 307
1909	Thecodontosauridae Arldt p. 261
1909	Thecodontosauridae Huene p. 13
1914	Thecodontosauridae Huene p. 12
1920	Thecodontosauridae Huene p. 162
1923	Thecodontosauridae Nopcsa p. 125
1928	Thecodontosauridae Nopcsa p. 182
1929	Thecodontosauridae Huene p. 271
1942	Thecodontosauridae Young p. 99
1946	Thecodontosauridae Kuhn p. 65
1948	Thecodontosauridae Huene p. 90
1954	Thecodontosauridae Haughton and Brink p. 4
1956	Thecodontosauridae Romer p. 617
1959	Thecodontosauridae Huene p. 120
1963	Thecodontosauridae Parsch p. 4
1964	Thecodontosauridae Colbert p. 20 fig. 6
1964	Thecodontosauridae Tatarinov p. 541
1966	Thecodontosauridae Romer p. 370
1967	Thecodontosauridae Charig p. 712
1970	Thecodontosauridae Colbert p. 27
1970	Thecodontosauridae Ellenberger et al. p. 158
1970	Thecodontosauridae Reig p. 276
1970	Thecodontosauridae Swinton p. 161
1971	Thecodontosauridae Bonaparte p. 160
1971	Thecodontosauridae Kuhn p. 17
1977	Thecodontosauridae Rozhdestvensky p. 112
2000	Thecodontosauridae Benton et al. p. 81

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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
—	Sauropsida
class	Reptilia

Rank	Name	Author
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Saurischia	()
—	Eusaurischia
—	Sauropodomorpha	(Huene 1932)
family	Thecodontosauridae	Lydekker 1890
family	Thecodontosauridae	Lydekker 1890

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.

Fm. †Thecodontosauridae Lydekker 1890

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G. †Pseudotrisauropus Ellenberger 1970

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†Pseudotrisauropus dieterleni Ellenberger 1970

†Pseudotrisauropus humilis Ellenberger 1970

†Pseudotrisauropus maserui Ellenberger 1970

†Pseudotrisauropus minusculus Ellenberger 1970

†Pseudotrisauropus molekoi Ellenberger 1970

†Pseudotrisauropus subengensis Ellenberger 1970

G. †Trichristolopus Ellenberger 1970

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†Trichristolopus dubius Ellenberger 1970

Diagnosis

Reference	Diagnosis
B. F. Nopcsa 1928	base of skull broad; condyle directed downward; bipedal animals
F. v. Huene 1948	Semiquadrupedal animals, of no large size.