Itapecuru Formation

The Itapecuru Formation is a geological formation in Itapecuru Mirim, Maranhão, Brazil.

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 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
Approximate paleocoordinates	8.6°S 15.9°W / -8.6; -15.9
Region	Itapecuru Mirim Maranhão
Country	Brazil
Extent	São Luís and 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

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.[4]	Indeterminate			Tooth
Oxalaia[2]	O. quilombensis				A spinosaurid theropod
Theropoda indet.[2]	Indeterminate

Crocodylomorphs

Crocodylomorphs of the Itapecuru Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Candidodon[5]	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[6]	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