Taxon sampling might be the critical factor, so if somebody would be good enough to pop over to Loch Ness and collect some plesiosaur DNA, it might prove extremely useful for molecular analyses.
Why are aquatic cryptids always plesiosaurs, anyway? Can't we get a latter-day mosasaur or mastodonsauroid, just for a change?
-- Andreas Johansson
Why can't you be a non-conformist just like everybody else?