👉 Sphenodesm, also known as sphenodonts, is a group of extinct mammals that lived during the Late Cretaceous period, which spanned from about 68-79 million years ago to around 52.5 million years ago. They were characterized by their long neck and a large snout compared to their body size, making them among the largest land animals on Earth at the time. Sphenodesm are known for their unique adaptations, including a highly
