Koum Formation

Koum Formation
Stratigraphic range: Aptian-Albian
~125–100 Ma
TypeGeological formation
Sub-unitsMbissirri Member, Grés de Gaba Member
Lithology
PrimarySandstone
OtherClaystone, siltstone, conglomerate
Location
Coordinates8°18′N 14°30′E / 8.3°N 14.5°E / 8.3; 14.5
Approximate paleocoordinates8°06′S 5°00′E / 8.1°S 5.0°E / -8.1; 5.0
RegionNord
Country Cameroon
ExtentKoum Basin
Koum Formation is located in Cameroon
Koum Formation
Koum Formation
Koum Formation
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

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.[2] Indeterminate
Carcharodontosauridae Indet. Indeterminate

Ornithopods

Ornithopods of the Koum Formation
Genus Species Location Stratigraphic position Material Notes Images
Ouranosaurus[3] 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

References

  1. ^ a b Weishampel et al., 2004, pp.571-573
  2. ^ 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.
  3. ^ 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.

Bibliography

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