Dukamaje Formation
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Sub-unitsGypsiferous shale Member
| Dukamaje Formation | |
|---|---|
| Stratigraphic range: Maastrichtian[1] | |
| Type | Geological formation |
| Sub-units | Gypsiferous shale Member |
| Lithology | |
| Primary | Mudstone, shale |
| Other | Siltstone, marl, gypsum |
| Location | |
| Coordinates | 15°24′N 5°48′E / 15.4°N 5.8°E |
| Approximate paleocoordinates | 5°06′N 0°36′E / 5.1°N 0.6°E |
| Region | Tahoua Sokoto |
| Country | Niger, Nigeria |
| Extent | Iullemmeden Basin |
| Type section | |
| Named for | Dukamaje, Sokoto, Nigeria |
  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]
| Dinosaurs of the Dukamaje Formation | ||||
|---|---|---|---|---|
| Taxa | Presence | Description | Images | |
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Genus:
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| Mosasaurs of the Dukamaje Formation | |||
|---|---|---|---|
| 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
- Fishes