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Abrosaurus dongpoensis
Taxonomy
Abrosaurus dongpoensis was named by Ouyang (1989). Its type specimen is ZDM 5038, a skull, 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 Abrosaurus.
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Abrosaurus dongpoensis Ouyang p. 10 |
| 2004 | Abrosaurus dongpoi Upchurch et al. p. 270 |
| 2005 | Abrosaurus dongpoi Peng et al. |
| 2021 | Abrosaurus dongpoensis Bindellini and Dal Sasso p. 153 |
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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.
†Abrosaurus dongpoensis Ouyang 1989
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Ouyang 1989 | A moderate sized sauropod with a delicately constructed skull and extremely large lateral cranial fenestrae. Height/length index is 1:1.8, ventral region is elongated, nasal crest is high, quadrate is nearly perpendicular, dorsal premaxillary process and the dorsal branch of the maxilla are equivalently long and are exceptionally slender and elongated. External nares are larger than the orbits, and antorbital fenestra is triangular. Parietal is narrow and the two supratemporal fenestra are in relatively close proximity. The mandible is thin with the midportion of the dentary being dorsoventrally constricted. Dentition with numerous basically spoon-shaped teeth, a lingual medial crest on the teeth is not well developed, labial striations are dense but pinnate striations are absent. Premaxillary teeth lack serrations, maxillary teeth possess only a few serrations, and mandibular replacement teeth possess a small amount of anterior and posterior serrations in addition to an extremely weak medial crest. | |
| G. Peng et al. 2005 | Medium-sized sauropod identified by lightly constructed skull with large external openings; cranial length about 2.5 times of its width; narrow and elongate facial region; nasal bridge arched upwards; very slender ascending processes of premaxilla and maxilla; external naris larger than orbit; large and triangular antorbital fenestra; narrowed interfenestral region; nearly vertical quadrate; low and elongate mandible with small external mandibular fenestra; slightly deepened anterior end of dentary; dental formula Pm5+M15~17/D16~18; slender and spoon-shaped teeth with developed vertical median ridge medially; premaxillary teeth without serrations on anterior and posterior margins, and cheek teeth with few 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) | Abrosaurus dongpoensis (type locality: 24883) |