Koum Formation

Koum Formation
Stratigraphic range: Aptian-Albian ~
Type	Geological formation
Sub-units	Mbissirri Member, Grés de Gaba Member
Lithology
Primary	Sandstone
Other	Claystone, siltstone, conglomerate
Location
Coordinates	8.3°N 14.5°E / 8.3; 14.5
Approximate paleocoordinates	8.1°S 5.0°E / -8.1; 5.0
Region	Nord
Country	Cameroon
Extent	Koum Basin
Koum Formation (Cameroon)

The Koum Formation is a geological formation in the North Province of Cameroon, western Africa.

Its strata date back to the Aptian and Albian stages of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.

Fossil content

The following fossils have been found in the formation:

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 Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Lithostrotia Indet.	Indeterminate
Rebbachisauridae Indet.	Indeterminate

Theropods

Theropods of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Abelisauridae Indet.	Indeterminate
Baryonychinae Indet.	Indeterminate
Carcharodontosauridae Indet.	Indeterminate

Ornithopods

Ornithopods of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Ouranosaurus	O. nigeriensis				A sail-backed hadrosauriform iguanodontian
Stegosauridae Indet.	Indeterminate

Pterosaurs

Pterosaurs of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Anhangueridae Indet.	Indeterminate

Crocodyliformes

Crocodyliformes of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Araripesuchus	A. sp.					A uruguaysuchid notosuchian

Mammals

Mammals of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Abelodon	A. abeli				A peramurid mammal

Fish

Cartilaginous fish

Cartilaginous fish of the Feliz Deserto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

Lobbed-finned fish

Lobbed-finned fish of the Feliz Deserto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

Ray-finned fish

Ray-finned fish of the Feliz Deserto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

See also

• List of dinosaur-bearing rock formations

References

Bibliography

• 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

Further reading

• J. D. Congleton. 1990. Vertebrate Paleontology of the Koum Basin, Northern Cameroon, and Archosaurian Paleobiogeography in the Early Cretaceous. Department of Geology, Southern Methodist University, Dallas xv-245
• L. J. Flynn and M. Brunet. 1989. Early Cretaceous vertebrates from Cameroon. Journal of Vertebrate Paleontology 9(3, suppl.):21A