The Itapecuru Formation is a geological formation in Itapecuru Mirim, Maranhão, Brazil.
| Itapecuru Formation | |
|---|---|
| Stratigraphic range: Aptian-Cenomanian ~ | |
| Type | Geological formation |
| Underlies | Alluvium & Corda Formation |
| Overlies | Codó, Grajaú & 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 |
| Approximate paleocoordinates | 8°36′S 15°54′W / 8.6°S 15.9°W |
| Region | Itapecuru Mirim Maranhão |
| Country |  Brazil |
| Extent | São Luís & Parnaíba Basins |
| Type section | |
| Named for | Itapecuru Mirim |
  Itapecuru Formation (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
editColor key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
editSauropods
edit| Sauropods of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Amazonsaurus[3] | A. maranhensis | A rebbachisaurid sauropod | ||||
| Sauropoda indet.[2] | Indeterminate | |||||
Theropods
edit| Theropods of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Abelisauridae Indet.[2] | Indeterminate | |||||
| Carcharodontosauridae Indet.[2] | Indeterminate | |||||
| Spinosauridae Indet.[2] | Indeterminate | |||||
| Theropoda indet.[2] | Indeterminate | |||||
Crocodylomorphs
edit| Crocodylomorphs of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Candidodon[4] | C. itapecuruense | A candidodontid notosuchian | ||||
Turtles
edit| Turtles of the Itapecuru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Itapecuruemys[5] | I. amazoniensis | A bothremydid turtle | ||||
See also
editReferences
edit- ^ 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. Bibcode:2016JSAES..66...15F. doi:10.1016/j.jsames.2015.12.005. ISSN 0895-9811.
- ^ a b c d e f 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. 24 (6). Elsevier BV: 697–713. Bibcode:2003CrRes..24..697D. doi:10.1016/j.cretres.2003.07.005. ISSN 0195-6671.
- ^ 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