Locality: Mont. Igdama, Illemmeden Basin of Niger, Central West Africa.

Horizon: Dukamaje Formation, ("Mosasaurus" Shales).

Biostratigraphy:

Age: Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

BMNH R11986, R11949, R11894, R11985: Teeth.

BMNH R11907: A very small vertebra.

BMNH R11919: Coracoid.

BMNH R11931: Radius.

Locality: Kehehe, Illemmeden Basin of Niger, Central West Africa.

Horizon: Dukamaje Formation, ("Mosasaurus" Shales).

Biostratigraphy:

Age: Late Cretaceous.

Material:

BMNH R11914: Three jaw fragments probably representing the same specimen and including a large tooth base.

BMNH R11917, R11918: 2 large disassociated vertebrae.