👉 Hemiprocninae are a group of animals that share a common ancestor with the horseshoe crab, also known as the crustacean. They belong to the class Chordata and have a highly developed internal organ system consisting of the vertebral column, spinal cord, and pelvic bones. These animals possess an incredibly complex digestive system, including a large intestine with a series of small intestines, which enables them to efficiently break down tough food without digestion.