A study, published in the Journal of Vertebrate Paleontology, offers a detailed description of a fossil of a pregnant ichthyosaur named Fiona, approximately 131 million years old, discovered in ...

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.

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.

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 ...