Fossilized eggshells from Gifu Prefecture, Japan, dating back to the Early Cretaceous period, reveal previously unknown egg species from a small theropod dinosaur. Dinosaurs left behind more evidence than just giant skeletons. Tiny eggshell fragments can provide insights into Mesozoic ecosystems
Fossilized eggshells from Gifu Prefecture, Japan, dating back to the EarlyDinosaurs left behind more evidence than just giant skeletons. Tiny eggshell fragments can provide insights intoecosystems that fossils of bones and teeth do not. This is particularly valuable for understanding the smaller animals that were less likely to be preserved. Early Cretaceous eggshell fragments, the oldest found in Japan, offer a glimpse into the ecosystem of dinosaurs during this time period.
Fossils of the small raptor that laid the eggs have not yet been discovered in the Lower Cretaceous strata that yielded these fossils. As first author Rina Uematsu explains, “Based on the dimensions of the egg fragments, we calculated that the adults of the maniraptoran species that laid them would have weighed about 12 to 17 kilograms.
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