Earth:Itapecuru Formation
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| Itapecuru Formation Stratigraphic range: Aptian-Cenomanian ~120–95 Ma | |
|---|---|
| Type | Geological formation |
| Underlies | Alluvium and Corda Formation |
| Overlies | Codó, Grajaú and Piauí Formations |
| Thickness | up to 2,000 m (6,600 ft) in São Luís Basin 700 m (2,300 ft) in Parnaíba Basin |
| Lithology | |
| Primary | Mudstone, sandstone |
| Other | Breccia, diamictite |
| Location | |
| Coordinates | [ ⚑ ] : 3°23′30″S 44°21′30″W / 3.39167°S 44.35833°W |
| Paleocoordinates | [ ⚑ ] 8°36′S 15°54′W / 8.6°S 15.9°W |
| Region | Itapecuru Mirim Maranhão |
| Country | Brazil |
| Extent | São Luís and Parnaíba Basins |
| Type section | |
| Named for | Itapecuru Mirim |
  Itapecuru Formation (Brazil) | |
The Itapecuru Formation is a geological formation in Itapecuru Mirim, Maranhão, Brazil.
It was formed during the Aptian to Albian stages of the Early Cretaceous.[1] Dinosaur remains are among the fossils that have been recovered from the formation.[2]
Fossil content
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
Sauropods
| Sauropods of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Amazonsaurus[3] | A. maranhensis | A rebbachisaurid sauropod | ||||
| Dasosaurus[4] | D. tocantinensis | Lower | A partial skeleton | A somphospondyli sauropod | ||
| Sauropoda indet.[2] | Indeterminate | |||||
Theropods
| Theropods of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Abelisauridae Indet.[2] | Indeterminate | |||||
| Carcharodontosauridae Indet.[5] | Indeterminate | Tooth | ||||
| Oxalaia[2] | O. quilombensis | A spinosaurid theropod | thumb | |||
| Theropoda indet.[2] | Indeterminate | |||||
Crocodylomorphs
| Crocodylomorphs of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Candidodon[6] | C. itapecuruense | A candidodontid notosuchian | ||||
Turtles
| Turtles of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Araripemys | A. barretoi | A araripemydid side-necked turtle | ||||
| Itapecuruemys[7] | I. amazoniensis | A bothremydid side-necked turtle | ||||
Fish
| Fishes of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Arganodus | A. tiguidiensis | A arganodontid lungfish | ||||
| Ceratodus | C. africanus | A ceradodontid lungfish | ||||
| Mawsonia | M. gigas | A mawsoniid coelacanth | ||||
See also
- Geologic formations of Brazil
- List of dinosaur-bearing rock formations
References
- ↑ Ferreira, Neila N.; Ferreira, Elizabete P.; Ramos, Renato R.C.; Carvalho, Ismar S. (2016). "Palynological and sedimentary analysis of the Igarapé Ipiranga and Querru 1 outcrops of the Itapecuru Formation (Lower Cretaceous, Parnaíba Basin), Brazil". Journal of South American Earth Sciences 66: 15–31. doi:10.1016/j.jsames.2015.12.005. ISSN 0895-9811. Bibcode: 2016JSAES..66...15F.
- ↑ 2.0 2.1 2.2 2.3 2.4 Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 600-604. ISBN 0-520-24209-2.
- ↑ de Souza Carvalho, Ismar; dos Santos Avilla, Leonardo; Salgado, Leonardo (2003). "Amazonsaurus maranhensis gen. et sp. nov. (Sauropoda, Diplodocoidea) from the Lower Cretaceous (Aptian–Albian) of Brazil". Cretaceous Research (Elsevier BV) 24 (6): 697–713. doi:10.1016/j.cretres.2003.07.005. ISSN 0195-6671. Bibcode: 2003CrRes..24..697D.
- ↑ Mayer, E. L.; Silva Junior, J. C. G.; Kerber, L.; Navarro, B. A.; Bandeira, K. L. N.; Cisneros, J. C.; Sousa, E. P.; Pereira, A. A. et al. (2026). "A new titanosauriform with European affinities in the Early Cretaceous of Brazil: insights on Somphospondyli phylogeny, histology and biogeography". Journal of Systematic Palaeontology 24. doi:10.1080/14772019.2025.2601579. https://www.tandfonline.com/doi/full/10.1080/14772019.2025.2601579.
- ↑ França, T. C.; Brilhante, N. S.; Delcourt, R.; Silva, J. L.; Hendrickx, C.; Medeiros, M. A.; Costa, F. R. (2025). "A carcharodontosaurid tooth from "Boca de Forno" Ravine of the Itapecuru Formation, Parnaíba Basin, Maranhão, Brazil". Cretaceous Research: 106163. doi:10.1016/j.cretres.2025.106163.
- ↑ Candidodon itapecuruense type locality at Fossilworks.org
- ↑ Batista, Diego L.; de Sousa Carvalho, I.; de la Fuente, M.S. (2020). "A new Cretaceous (Pleurodira: Pelomedusoides) from the Lower Cretaceous of Parnaíba Basin, Brazil": Journal of South American Earth Sciences. https://doi.org/10.1016/j.jsames.2020.102872
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