Species: lawanhungudui HALSTEAD, 1979
Etymology: In honour of Alhaji Lawan Bungundu, formerly Hon. Commissioner of
Education, Sokoto State, Nigeria.
Holotype: SOGS. Pal. Coll. number 1.
Locality: On northern face of Benbow Hill to the southeast of the village of Gilbedi, Sokoto State, Nigeria.
Horizon: Approximately 2 m above bone bed, Dukamje Formation.
Biostratigraphy:
Age: Maastrichtian Stage, uppermost Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material: Fragmentary skull and shell.
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Species: umarumohammedi HALSTEAD, 1979
Etymology: In honour of Colonel Umaru Alhji Mohammed, formerly Military Governor
of Sokoto State, Nigeria.
Holotype: SOGS Pal. Coll.number 2.
Locality: On northern face of Benbow Hill to the southeast of the village of Bilbedi, Sokoto State, Nigeria.
Horizon: Approximately 2 m above bone bed, Dukamaje Formation.
Biostratigraphy:
Age: Maastrichtian Stage, uppermost Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material: Fragmentary skull and fragmentary shell.