Tuchengzi Formation
| Tuchengzi Formation | ||
|---|---|---|
Ma Approximate paleocoordinates 44°06′N 126°06′E / 44.1°N 126.1°E | | |
| Region | Beijing, Hebei, Liaoning | |
| Country |  China | |
| Type section | ||
| Named for | Tuchengzi, Beipiao, Liaoning | |
| Named by | Chao-Chi Lin | |
| Year defined | 1942 | |
  Tuchengzi Formation (China)  Tuchengzi Formation (Liaoning) | ||
The Tuchengzi Formation (formerly known as Tucheng Conglomerate, from
formation in China whose strata span the Tithonian (Late Jurassic) to Berriasian (Early Cretaceous) ages.[1] Dinosaur fossils, particularly footprints, have been found from the formation.[3][4]
Fossil content
Color key
|
Notes Uncertain or tentative taxa are in small text; |
The Tuchengzi Formation was deposited during a time of transition between the
Jehol biota. The Tuchengzi represents a poorer, more arid climate that appears to have caused much of the Daohugou fauna to become extinct. They would later be replaced by the Jehol biota when conditions became more favorable to a diversity of terrestrial animal life.[1]
Reptiles
Indeterminate sauropod remains formerly attributed to the Mamenchisauridae and Brachiosauridae have been found in Liaoning, China.[3] Theropod tracks, including those made by avialans, have been found in Liaoning, China.[3]
| Genus | Species | County | Member | Abundance | Notes | Image |
|---|---|---|---|---|---|---|
| Orientognathus | O. chaoyangensis | Chaoyang, Liaoning.[5] | "An incomplete skeleton (41HIII-0418)".[5] | A rhamphorhynchid pterosaur. | ||
| Chaoyangsaurus | C. youngi | Liaoning.[6] | "Partial skull with mandible, cervicals, humerus, and scapula."[7] | A basal ceratopsian. | ||
|
Grallator isp. |
Footprints belonging to the Grallator form taxon, made by an unknown small theropod.[8]
|
|||||
|
M. sinensis |
Hebei |
Footprints belonging to the Menglongipus sinensis form taxon, made by an unknown small (~65 cm long) deinonychosaur[8] |
Plants
| Genus | Species | County | Member | Abundance | Notes | Images |
|---|---|---|---|---|---|---|
| Brachyoxylon | B. yanqingense | Fossil wood.[9] | ||||
| Xenoxylon | X. latiporosum | Fossil wood.[10] | ||||
| X. peidense | Fossil wood.[10] |
See also
- List of dinosaur-bearing rock formations
References
- ^ a b c Liu Y.-Q. Kuang H.-W., Jiang X.-J., Peng N., Xu H. & Sun H.-Y. (2012). "Timing of the earliest known feathered dinosaurs and transitional pterosaurs older than the Jehol Biota." Palaeogeography, Palaeoclimatology, Palaeoecology (advance online publication).
- .
- ^ ISBN 0-520-24209-2.
- S2CID 210266977.
- ^ PMID 25661600.
- ISSN 0272-4634.
- ^ "Table 22.1," in Weishampel, et al. (2004). Page 480.
- ^ a b Xing, L.; Harris, J.D.; Sun, D.; Zhao, H. (2010). "The earliest known deinonychosaur tracks from the Jurassic-Cretaceous boundary in Hebei Province, China". Acta Palaeontologica Sinica. 48 (4): 662–671.
- ^ S2CID 252792439.
- ^ S2CID 212883753.