Dukamaje Formation
![Dukamaje Formation is located in Niger](http://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Niger_relief_location_map.jpg/250px-Niger_relief_location_map.jpg)
![Dukamaje Formation](http://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Lightgreen_pog.svg/12px-Lightgreen_pog.svg.png)
Dukamaje Formation (Niger)
The Dukamaje Formation is a geological formation in Niger and Nigeria whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1] A wealth of Mosasaur fossils have also been recovered from this formation, particularly from the area around Mt. Igdaman.[2]
Fossil content
Dinosaurs of the Dukamaje Formation | ||||
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Taxa | Presence | Description | Images | |
Genus:
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Mosasaurs of the Dukamaje Formation | |||
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Taxa | Presence | Description | Images |
Genus:
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| Mid-sized globidensine mosasaur.[3] Originally described as a plioplatecarpine. Durophagous.[2] | ![]() |
Genus:
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| Large mosasaur of uncertain affiliations. High number of foramina on the snout and small eyes indicate a murky-water hunter.[4] | |
Genus:
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| Represented here by four vertebrae, one from a juvenile. Fragmentary state makes identification difficult.[2] | |
Genus:
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| Mid-sized mosasaur. Represented here by four vertebrae.[2] | |
Genus:
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| Mid-sized plioplatecarpine mosasaur. Represented here by several vertebrae.[2] | |
Genus:
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| Mid-sized plioplatecarpine mosasaur. Represented here by a single fragmentary vertebrae.[2] | |
Genus:
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| Massive mosasaurine mosasaur. Represented here by a fragmentary tooth crown. The first example of Mosasaurus from Niger and Nigeria.[2] |
- Other reptiles
- Sokotosuchus ianwilsoni[5]
- Palaeophis sp.[6]
- Podocnemis sp.
- Trematochampsa taqueti
- Libycosuchus sp.
- Fishes
- Asteracanthus aegyptiacus[7]
- Igdabatis sigmodon
- Lamna nigeriana
- Schizorhiza stromeri
- Stephanodus lybicus
- Stratodus apicalis
- Ischyrhiza nigeriensis
- Ceratodus sp.
- Ginglymostoma sp.
- Pycnodus sp.
See also
- List of dinosaur-bearing rock formations
- Lists of fossiliferous stratigraphic units in Africa
- Geology of Niger
- Geology of Nigeria
References
- ^ a b c d e Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 604-605. ISBN 0-520-24209-2.
- ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab Lingham-Soliar, Theagarten (1991). "Mosasaurs from the upper Cretaceous of Niger". Palaeontology. 34: 653–670.
- ^ Lindgren, Johan (2005). "Dental and vertebral morphology of the enigmatic mosasaur Dollosaurus (Reptilia, Mosasauridae) from the lower Campanian (Upper Cretaceous) of southern Sweden". Bulletin of the Geological Society of Denmark. 52: 17–25. doi:10.37570/bgsd-2005-52-03.
- ^ "Tongues, venom glands, and the changing face of Goronyosaurus". Tetrapod Zoology. Retrieved 2017-01-11.
- ^ Gilbedi Hills, Rima River at Fossilworks.org
- ^ Mont Igdaman (bed 25) at Fossilworks.org
- ^ In Touhout (bed 4) at Fossilworks.org
Further reading
- R. T. J. Moody and P. J. C. Suttcliffe. 1991. The Cretaceous deposits of the Iullemmeden Basin of Niger, central West Africa. Cretaceous Research 12:137-157