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Re: Marine question



> I was wondering why Ichthyosaurs disappeared before the end of the
Cretaceous.

Apparently they disappeared at the Cenomanian-Turonian boundary... which is
associated with a terrific Oceanic Anoxic Event and a considerable mass
extinction. A few more ichthyosaur fossils would definitely not hurt,
though. Cenomanian ichthyosaurs seem to be very, very rare; BTW, all K
ichthyosaurs are referred to *Platypterygius*.