What is another word for heterostracan?
Pronunciation: [hˈɛtɹə͡ʊstɹˌakən] (IPA) 
Heterostracans are an extinct group of jawless fish that lived during the Silurian and Devonian periods. While there are no exact synonyms for the term "heterostracan," there are several related words that can be used to describe this group of fish. For example, "agnathan" is a term used to describe all jawless fish, including heterostracans. "Osteostracans" are another group of extinct armored fish that share some similarities with heterostracans. Additionally, "parasitic lampreys" and "eel-like hagfish" are also jawless fish that share some characteristics with heterostracans. Despite their extinct status, heterostracans and their related species have contributed greatly to our understanding of early vertebrate evolution.
