👉 The term "palaeogaean" is a term used in paleontology to refer to fossils of marine organisms that are believed to have lived during or before the Paleozoic Era (around 453 million years ago). These fossils were deposited in shallow, nutrient-rich environments and were thought to be ancient creatures. However, recent research has shown that these fossils may actually belong to modern marine species. Palaeogaean fossils provide important insights into the evolutionary history of marine organisms, as well