Lower Dharmaram Formation
| Lower Dharmaram Formation | |
|---|---|
| Stratigraphic range: Latest Norian–Rhaetian ~ | |
| Type | Geological formation |
| Unit of | Gondwana Group |
| Underlies | Upper Dharmaram Formation |
| Overlies | Upper Maleri Formation |
| Lithology | |
| Primary | Sandstone, Mudstone |
| Location | |
| Coordinates | 19°12′N 79°36′E / 19.2°N 79.6°E |
| Approximate paleocoordinates | 32°18′S 36°06′E / 32.3°S 36.1°E |
| Region | Telangana |
| Country |  India |
| Extent | Pranhita–Godavari Basin |
| Type section | |
| Named for | Dharmaram |
  Lower Dharmaram Formation (India) | |
The Lower Dharmaram Formation is a sedimentary rock formation found in Andhra Pradesh, India. It is one of the formations of the Pranhita–Godavari Basin. It is of latest Norian and Rhaetian ages (Upper Triassic), and is notable for its fossils of early dinosaurs.
Vertebrate fauna
[edit]cf. Paratypothorax, cf. Nicrosaurus, fragmentary remains of sauropodomorphs (ISI R279, 280, 281) and neotheropods (ISI R283) have also been recovered from it.[1]
Color key
|
Notes Uncertain or tentative taxa are in small text; |
| Dinosaurs reported from the Lower Dharmaram Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Jaklapallisaurus | J. assymetrica[1] | Telangana | "ISI R279, distal end of right femur."[1] | A unaysaurid, also found in the Upper Maleri Formation | ||
| Sauropodomorpha | Indeterminate | Telangana | "ISIR 280, astragalus." | An Indeterminate Sauropodomorpha | ||
| Neotheropoda | Indeterminate | Telangana | "ISIR 283." | An Indeterminate Neotheropod | ||
| Pseudosuchians reported from the Lower Dharmaram Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Venkatasuchus | V. armatus[2] | Telangana | A typothoracine aetosaur | |||
| cf. Paratypothorax | sp. | Telangana | ||||
| cf. Nicrosaurus | sp. | Telangana | ||||
| Desmatosuchinae indet.[2] | Telangana | |||||
Correlations
[edit]The formation has been correlated with the Lower Elliot Formation (Karoo Basin) and Forest Sandstone of Africa, the Caturrita Formation of the Paraná Basin in Brazil, the Laguna Colorada and Los Colorados Formations (Ischigualasto-Villa Unión Basin) of Argentina, the Chinle Formation of North America, the Trossingen Formation of the Keuper of Germany, and the Nam Phong Formation of Thailand.[3]
See also
[edit]
References
[edit]- ^ a b c Novas et al., 2011, p.345
- ^ a b Haldar, A.; Ray, S.; Bandyopadhyay, S. (2023). "A new typothoracine aetosaur (Archosauria, Pseudosuchia) from the Upper Triassic of India with insights on biostratigraphy, diversification, and paleobiogeography". Journal of Vertebrate Paleontology. e2253292. doi:10.1080/02724634.2023.2253292.
- ^ Novas et al., 2011, p.343
Bibliography
[edit]- Novas, Fernando E.; Ezcurra, Martín D.; Chatterjee, Sankar; Kutty, T.S. (2011), "New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of central India", Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 101 (3–4): 333–349, Bibcode:2010EESTR.101..333N, doi:10.1017/S1755691011020093, retrieved 6 April 2019doi:10.1017/S1755691011020093
Further reading
[edit]- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 21 February 2019
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