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Protognathosaurus oxyodon
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), Li et al. (2011).
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), Li et al. (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1988 | Protognathus oxyodon Zhang |
| 1991 | Protognathosaurus oxyodon Olshevsky p. 21 |
| 1992 | Protognathus oxyodon Dong p. 163 |
| 1992 | Protognathosaurus oxyodon Olshevsky p. 179 |
| 1997 | Protognathosaurus oxyodon Dong p. 793 |
| 1999 | Protognathosaurus oxyodon Martin-Rolland p. 310 |
| 2005 | Protognathosaurus oxyodon Peng et al. |
| 2011 | Protognathosaurus oxyodon Li et al. p. 23 |
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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.
†Protognathosaurus oxyodon Zhang 1988
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Peng et al. 2005 | Medium-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. |
Measurements
No measurements are available
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| Source: infrao = infraorder | |||||
| Reference: Marsh 1875 | |||||
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bajocian - Oxfordian | China (Sichuan) | Protognathus oxyodon (type locality: 24883) |