Purranisaurus

Purranisaurus is an extinct genus of marine crocodyliform from the Middle to Late Jurassic period of Chile and Argentina. Rusconi originally regarded "Purranisaurus potens" (the type species) to be a plesiosaur; however, Gasparini demonstrated that it was in fact a metriorhynchid crocodyliform, and that may be a junior synonym of "Metriorhynchus". 
Taxonomy and phylogeny.
In the 2000s phylogenetic analysis has shown that "Purranisaurus" is a distinct metriorhynchid genus. A subsequent study expanded the genus "Purranisaurus" to include "Metriorhynchus casamiquelai" and "M. westermanni". Following the re-description of the holotype of the type species, only that species is now referred to "Purranisaurus". 