Halisaurus, ORTLIEBI (DOLLO, 1889)

Bardet, Nathalie, Suberbiola, Xabier Pereda, Iarochene, Mohamed, Bouya, Baadi & Amaghzaz, Mbarek, 2005, A new species of Halisaurus from the Late Cretaceous phosphates of Morocco, and the phylogenetical relationships of the Halisaurinae (Squamata: Mosasauridae), Zoological Journal of the Linnean Society 143 (3), pp. 447-472 : 465

HALISAURUS ORTLIEBI ( DOLLO, 1889)

Holotype: IRSNB R34, incomplete skull described by Dollo (1889: 181–182).

Type locality and horizon: Ciply Phosphatic Chalk (Early Maastrichtian), near Mesvin, Hainault, Belgium.

Emended diagnosis: Autapomorphies: regularly oval external naris; prefrontal with small narial participation and anteriorly located supraorbital ridge; frontal with median dorsal ridge extending on the whole length of the bone; parietal with smooth triangular table with very large circular foramen invading the frontal and bordered posteriorly by a teardrop-shaped depression; quadrate with a very narrow and vertical stapedial notch; pterygoid with eight teeth and short palatine process at about 45∞ relative to the ectopterygoid process.