👉 Aiptasiomorphidae are a group of extinct amphibian chiroptera that lived during the Cretaceous period, approximately 69 million years ago. They were characterized by their long, slender bodies and a highly specialized respiratory system with a trachea and lungs. Aiptasiomorphidae had a complex digestive system, including a small intestine, which allowed for rapid food absorption and a high metabolism rate. Their fossils have been found in various locations across North America