Species: walkeri LINGHMAN-SOLIAR, 1998
Etymology: In honor of Cyril A. Walker to mark his contributions as a vertebrate paleontologist at the Natural History Museum, London (BMNH) and his generosity to the uninitiated student (of which I was one) and to the famous alike.
= Halisaurus walkeri (LINGHMAN-SOLIAR, 1998) LINDGREN & SIVERSON, 2005

Holotype: BMNH R14153

Locality: Igdaman locality, near Mount Illatarda, Iullemmeden Basin, Niger.

Horizon: The Farin-Doutchi Formation, “Mosasaurus Shales”.

Biostratigraphy:

Age: ?Lower Maastrichtian Stage, Uppermost Senonian, Uppermost Gulf Epoch, Late Cretaceous.

Material: An almost complete dentary with the anterior tip and fragments of the ventral and postero-ventral flange missing.

Referred material:

= Pluridens cf. walkeri MUSTAFA & ZALMOUT, 2001

Locality: Esh-Shidiya Phosphate Mine, South Jordan.

Horizon: Upper Part of Amman Formation.

Biostratigraphy:

Age: Early Maastrichtian Stage, Late Senonian Subepoch, Late Gulf Epoch, Late Cretaceous.

Material:

YUPEH3: 3 teeth.

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Species: calabaria LONGRICH, 2018
Etymology: In reference to the city of Calabar, near the type locality.

Holotype: NHMUK R9804

Locality: Near Calabar, Southern Nigeria.

Horizon: Nkporo Shale.

Biostratigraphy: Nostocera (Bostrychocera) polyplocum ammonite zone.

Age: Lower Campanian Stage, Senonian, Gulf Epoch, Late Cretaceous.

Material: Partial right dentary and associated splenial.