The Family Akeridae is commonly known as the horned trilobites family, and it belongs to the order of Phacopida in the class Trilobita. The word 'Akeridae' is used to refer to a group of ancient, extinct arthropods that lived during the Paleozoic era. Synonyms for the family include the genuses Akeria and Anisopyge. Some of the defining features of this family include their prominent horns, which were used for defence, and their wide thorax. They are thought to have lived in shallow, warm seas, and their fossils have been found all over the world. Today, they are an important subject of study for paleontologists, who use them to learn more about the evolution of life on Earth.