Scientists classify pregnant ichthyosaur fossil 'Fiona' found in Chilean Patagonia. (photo credit: Archive of the Natural Museum of Rio Seco) A study, published in the Journal of Vertebrate ...

she noticed unusual bones between the ribs of the main fossil, indicating the presence of a fetus — but it wasn't until 2022 that the pregnant ichthyosaur, dubbed Fiona, was fully excavated.

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