Itapecuru Formation

Itapecuru Formation
Stratigraphic range: Aptian-Cenomanian ~120–95 Ma PreꞒ Ꞓ O S D C P T J K Pg N
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
Approximate paleocoordinates	8.6°S 15.9°W / -8.6; -15.9
Region	Itapecuru Mirim  Maranhão
Country	Brazil
Extent	São Luís & 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 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

Sauropods

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

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

Crocodylomorphs of the Itapecuru Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Candidodon[4]	C. itapecuruense				A candidodontid notosuchian

Turtles

Turtles of the Itapecuru Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Itapecuruemys[5]	I. amazoniensis				A bothremydid turtle

See also

• Geologic formations of Brazil
• List of dinosaur-bearing rock formations

References

1. 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.
2. 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.
3. 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.
4. Candidodon itapecuruense type locality at Fossilworks.org
5. 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