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

Protognathosaurus oxyodon

Reptilia - Cetiosauridae

Taxonomy
Protognathus oxyodon was named by Zhang (1988). Its type specimen is CHG CV 00732, a mandible (left dentary), and it is a 3D body fossil. Its type locality is Dashanpu Dinosaur Quarry [lower], which is in a Bajocian/Oxfordian lacustrine sandstone/mudstone in the Shaximiao Formation of China. It is the type species of Protognathus, Protognathosaurus.

It was considered a nomen dubium by Upchurch et al. (2004); it was recombined as Protognathosaurus oxyodon by Olshevsky (1991), Olshevsky (1992), Dong (1997), Martin-Rolland (1999), Peng et al. (2005) and Li et al. (2011).

Synonymy list
YearName and author
1988Protognathus oxyodon Zhang
1991Protognathosaurus oxyodon Olshevsky p. 21
1992Protognathus oxyodon Dong p. 163
1992Protognathosaurus oxyodon Olshevsky p. 179
1997Protognathosaurus oxyodon Dong p. 793
1999Protognathosaurus oxyodon Martin-Rolland p. 310
2005Protognathosaurus oxyodon Peng et al.
2011Protognathosaurus oxyodon Li et al. p. 23

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

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
Romeriida
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Saurischia()
Sauropoda()
Gravisauria
Eusauropoda
familyCetiosauridae
genusProtognathosaurus
speciesoxyodon()

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.

show all | hide all
Diagnosis
ReferenceDiagnosis
G. Peng et al. 2005Medium-sized primitive sauropod recognized by thick and heavy dentary with a deepened anterior end and gradually decreased dorsal margin; middle portion of dentary relatively contracted; meckelian canal quite deep and long; elongate dentition with 19~20 dentary teeth; slender and pointed dentary tooth crown with an undeveloped median ridge, metrical anterior and posterior ridges and 4~5 obvious serrations.