Reassessment of cf. Plotosaurus from the upper Maastrichtian of Chile, with comments on the South American distribution of halisaurine mosasaurs

The reassessment of a lower jaw fragment of a mosasaur from the upper Maastrichtian of central Chile (Q.3105) indicates that the specimen does not belong to Plotosaurus, as previously suggested by Frey et al. in 2016. The specimen does not show the characteristics of Plotosaurus, such as the long projection anterior to the anteriormost tooth socket of the dentary, the ventrally positioned Meckelian canal, nor does it possess teeth with enamel...