Lower Dharmaram Formation

Lower Dharmaram Formation
Stratigraphic range: Latest Norian–Rhaetian
~211–202 Ma
TypeGeological formation
Unit ofGondwana Group
UnderliesUpper Dharmaram Formation
OverliesUpper Maleri Formation
Lithology
PrimarySandstone, Mudstone
Location
Coordinates19°12′N 79°36′E / 19.2°N 79.6°E / 19.2; 79.6
Approximate paleocoordinates32°18′S 36°06′E / 32.3°S 36.1°E / -32.3; 36.1
RegionTelangana
Country India
ExtentPranhita–Godavari Basin
Type section
Named forDharmaram
Lower Dharmaram Formation is located in India
Lower Dharmaram Formation
Lower Dharmaram Formation (India)

The Lower Dharmaram Formation is a sedimentary rock formation found in Telangana, 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

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
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
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, incomplete femur." 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

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

References

  1. ^ a b c Novas et al., 2011, p.345
  2. ^ 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.
  3. ^ Novas et al., 2011, p.343

Bibliography

Further reading


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