👉 Heterognathia is a term used in biology and paleontology to describe a group of animals that have similar morphological features, such as having long necks, soft fleshy skin, and large teeth. These animals belong to different orders or families, but share some similarities, including the presence of a small brain and a backbone with a few vertebrae. Heterognathia is considered to be an important group in paleontology for its unique anatomy and evolutionary history.