The discovery was announced yesterday by fossil specialists at the British Association for the Advancement of Science's annual meeting in Dublin.
"These finds are quite amazing - we already knew this was the largest animal ever to fly but no one thought they would be this big," said David Martill, of Portsmouth University.
"These are truly enormous creatures and we keep having to revise our estimates upwards - we're starting to see the same thing as happened with fossils of the big land-based dinosaurs where we kept having to increase our estimates upwards from 50 tonnes to 60 tonnes, then 100 tonnes."
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