Koum Formation

Koum Formation
Stratigraphic range: Aptian-Albian ~125–100  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Sub-units	Mbissirri Member, Grés de Gaba Member
Lithology
Primary	Sandstone
Other	Claystone, siltstone, conglomerate
Location
Coordinates	8°18′N14°30′E / 8.3°N 14.5°E / 8.3; 14.5
Approximate paleocoordinates	8°06′S5°00′E / 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. ^[1]

Fossil content

The following fossils have been found in the formation: ^[1]

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

Ornithopods

Ornithopods of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Ouranosaurus [2]	O. nigeriensis				A sail-backed hadrosauriform iguanodontian

Sauropoda

Sauropods of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Sauropoda Indet.	Indeterminate

Theropods

Theropods of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Baryonychinae Indet. [3]	Indeterminate				A spinosaurid theropod
Theropoda Indet.	Indeterminate

Thyreophorans

Thyreophorans of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
?Thyreophora Indet.	Indeterminate

Crocodylomorphs

Crocodylomorphs of the Koum Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Araripesuchus	A. wegeneri				A uruguaysuchid notosuchian
Brillanceausuchus	B. babouriensis				A paralligatorid crocodyliform

Mammals

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

See also

• List of dinosaur-bearing rock formations

References

1. Weishampel et al., 2004, pp.571-573
2. Congleton, J.D. (1990). "Vertebrate Paleontology of the Koum Basin, Northern Cameroon, and Archosaurian Paleobiogeography in the Early Cretaceous". Department of Geology, Southern Methodist University, Dallas.
3. Bertin, Tor (2010). "A Catalogue of Material and Review of the Spinosauridae". PalArch's Journal of Vertebrate Palaeontology. 7 (4): 01–39. ISSN   1567-2158.

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