Bahia Group
| Bahia Group | |
|---|---|
| Stratigraphic range: Valanginian-Hauterivian | |
| Type | Group |
| Sub-units | Marfim Formation |
| Lithology | |
| Primary | Conglomerate |
| Location | |
| Coordinates | 12°54′S 38°30′W / 12.9°S 38.5°W |
| Approximate paleocoordinates | 12°42′S 5°42′W / 12.7°S 5.7°W |
| Region | Bahia |
| Country | Brazil |
| Extent | Recôncavo Basin |
| Type section | |
| Named for | Bahia |
  Bahia Group (Brazil) | |
The Bahia Group, also known as Bahia Series, is an Early Cretaceous geologic group of the Recôncavo Basin in Bahia, Brazil dating back to the Valanginian and Hauterivian. Dinosaur remains are among the fossils that have been recovered from unit, including those of the ornithopod Tietasaura from the Marfim Formation.[1][2] The conglomerates were deposited in an estuarine environment.[3]
Fossil content
[edit]Color key
|
Notes Uncertain or tentative taxa are in small text; |
Ornithopods
[edit]| Ornithopods of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Iguanodontia Indet. | Indeterminate | |||||
| Tietasaura | T. derbyiana | A elasmarian ornithopod |  | |||
Sauropods
[edit]| Sauropods of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Diplodocidae Indet. | Indeterminate | |||||
| Lithostrotia Indet. | Indeterminate | |||||
Theropods
[edit]| Theropods of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Carcharodontosauria Indet. | Indeterminate | |||||
| Spinosauridae Indet. | Indeterminate | |||||
| Tyrannosauroidea? Indet. | Indeterminate | |||||
Pterosaurs
[edit]| Pterosaurs of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Anhangueridae Indet. | Indeterminate | |||||
Crocodylomorphs
[edit]| Crocodylomorphs of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Sarcosuchus[4] | S. hartti | A pholidosaurid crocodyliform | ||||
| "Thoracosaurus" | "T. bahiensis" | A gavialoid crocodilian | ||||
Turtles
[edit]| Turtles of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Testudines Indet. | Indeterminate | |||||
Fish
[edit]| Fishes of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Acrodus | A. nitidus | A acrodontid hybodont | ||||
| "Belonostomus" | "B". carinatus | A aspidorhynchid fish | ||||
| Calamopleurus | C. mawsoni | A amiid fish | ||||
| Ellimmichthys | E. longicostatum | A ellimmichthyiform fish | ||||
| E. spinosus | ||||||
| Lepidotes | L. spp. | A lepidotid fish | ||||
| Mawsonia | M. gigas | A mawsoniid coelacanth | ||||
| Scrombroclupeoides | S. scutata | A clupeomorph fish | ||||
| Scutatuspinosus | S. itapagipensis | A ellimmichthyiform fish | ||||
Molluscs
[edit]Bivalves
[edit]| Bivalves of the Bahia Group | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Anhapoa[5] | A. munizi | A iridinid bivalve | ||||
| Duplexium[5] | D. jatobensis | A iridinid bivalve | ||||
See also
[edit]References
[edit]- ^ Bandeira, Kamila L. N.; Navarro, Bruno A.; Pêgas, Rodrigo V.; Brilhante, Natan S.; Brum, Arthur S.; de Souza, Lucy G.; de Silva, Rafael C.; Gallo, Valéria (2024). "A reassessment of the historical fossil findings from Bahia State (Northeast Brazil) reveals a diversified dinosaur fauna in the Lower Cretaceous of South America". Historical Biology: 1–42. doi:10.1080/08912963.2024.2318406.
- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ Pedra Furada Bay at Fossilworks.org
- ^ Souza, Rafael G; Figueiredo, Rodrigo G; Azevedo, Sérgio A K; Riff, Douglas; Kellner, Alexander W A (August 12, 2019). "Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil". Zoological Journal of the Linnean Society: zlz057. doi:10.1093/zoolinnean/zlz057. ISSN 0024-4082.
- ^ a b Baumann, D. E.; Simone, L. R. L.; Silva, R. C.; Ghilardi, R. P. (2025). "The Oldest Record of the Family Iridinidae (Unionida): New Fossil Genera and Species of Bivalves from the Salvador Formation (Berriasian), Jatobá Basin, Northeastern Brazil". Journal of South American Earth Sciences. 105587. doi:10.1016/j.jsames.2025.105587.
Bibliography
[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 2019-02-21
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Further reading
[edit]- J. Mawson and A. S. Woodward. 1907. On the Cretaceous formation of Bahia (Brazil), and on vertebrate fossils collected therein. Quarterly Journal of the Geological Society of London 63:128-139