Name: Proaigialosaurus ‭(‬Before Aigialosaurus‭)‬.
Phonetic: Pro-ay-ge-al-o-sore-us.
Named By: Kuhn‭ ‬-‭ ‬1958.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Diapsida,‭ ‬Lepidosauria.
Species: P.‭ ‬huenei‭ (‬type‭)‬.
Diet: Piscivore/carnivore.
Size: Probably no more than a meter long.
Known locations: Germany‭ ‬-‭ ‬Solnhofen Limestone.
Time period: Late Jurassic.
Fossil representation: Skull fragments.

       At various times Proaigialosaurus has been considered to be a pleurosaur,‭ ‬a sphenodont to even a primitive member of the Aigialosauridae,‭ ‬hence the name Proaigialosaurus which means‭ ‘‬before Aigialosaurus‭’‬,‭ ‬a reference to the type genus of this group.‭ ‬However the Aigialosauridae contains some of the primitive‭ ‬mosasaurs,‭ ‬and most of the genera from here are known from early in the Late Cretaceous,‭ ‬whereas the deposit that the Proaigialosaurus holotype specimens were discovered is Late Jurassic,‭ ‬many tens of millions of years older.‭ ‬To confound matters further,‭ ‬not only was Proaigialosaurus named from very partial skull remains,‭ ‬these are at the time of writing lost,‭ ‬making a more in‭ ‬depth study of Proaigialosaurus all the more difficult.

Further reading
-‭ ‬A review of the taxonomy and systematics of aigialosaurs.‭ ‬Netherlands Journal of Geosciences‭ ‬84‭ (‬3‭)‬:‭ ‬221‭ ‬-‭ ‬22.‭ ‬-‭ ‬A.‭ ‬R.‭ ‬Dutchak‭ ‬-‭ ‬2005.


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