PBDB Taxon

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Archegosaurus

Amphibia - Temnospondyli

Taxonomy

Archegosaurus was named by Goldfuss (1847). It is not extant.

It was assigned to Labyrinthodontes by Roemer (1856); to Ganocephala by Owen (1859), Owen (1860) and Owen (1861); to Archegosaurinae by Schoch and Milner (2000); to Archegosauridae by Watson (1919), Carroll (1988), Gubin (1997), Yates and Warren (2000) and Witzmann (2005); and to Stereospondylomorpha by Schoch (2013).

Species

A. decheni (syn. A. minor, A. medius), A. dyscriton, A. latifrons

Synonyms

Memonomenos was named by Steen (1938). It is not extant.

It was synonymized subjectively with Archegosaurus by Milner (1978).

It was assigned to Eogyrinidae by Panchen (1970).

Synonymy list

Year	Name and author
1847	Archegosaurus Goldfuss
1856	Archegosaurus Roemer p. 780
1859	Archegosaurus Owen p. 132
1860	Archegosaurus Owen p. 168
1861	Archegosaurus Owen p. 197
1919	Archegosaurus Watson p. 66
1938	Memonomenos Steen
1970	Memonomenos Panchen p. vii
1988	Archegosaurus Carroll
1997	Archegosaurus Gubin pp. 105, 107
2000	Archegosaurus Schoch and Milner p. 55
2000	Archegosaurus Yates and Warren pp. 84, 93 fig. 1
2005	Archegosaurus Witzmann p. 132
2013	Archegosaurus Schoch

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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)

Rank	Name	Author
subclass	Tetrapodomorpha	()
—	Tetrapoda
class	Amphibia
order	Temnospondyli	()
—	Eutemnospondyli
—	Rhachitomi	()
—	Eryopiformes
—	Stereospondylomorpha
genus	Archegosaurus	Goldfuss 1847

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. †Archegosaurus Goldfuss 1847

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†Archegosaurus decheni Goldfuss 1847

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Invalid names: Archegosaurus medius Goldfuss 1847 [synonym], Archegosaurus minor Goldfuss 1847 [synonym]

†Archegosaurus dyscriton Steen 1938

†Archegosaurus latifrons Geinitz and Deichmüller 1882

Invalid names: Memonomenos Steen 1938 [synonym]

Diagnosis

Reference	Diagnosis
Y. M. Gubin 1997	"Nostrils not far from the anterior edge of skull; oval premaxillary fossa. Ratio of length to width of choana is 9.0. Anterior palatal vacuities absent."