What is another word for cephalaspida?
Pronunciation: [sˈɛfɐlˌaspɪdə] (IPA) 
Cephalaspida is a class of extinct jawless fish that lived during the early to middle Silurian period. These fish were characterized by their elongated, tube-like bodies and unique set of head armor. However, there are plenty of synonyms for this fascinating ancient fish. Some of these synonyms include osteostracans, arandaspids, petalaspids, dicranaspids, and galeaspids. While they vary in terms of their physical features and geographic distribution, they are all considered parts of the earliest jawless fish lineages and played an integral role in the evolutionary history of vertebrates. Today, their fossils offer valuable insights into the development and diversification of the first fish.
