Rhegmaspis xiphoidea: New Species of Jawless Fish Unearthed in China

A new species – and genus – of armored jawless fish has come to light in the Chinese rocks dating to the Pragian stage of Devonian. The fish, named Rhegmaspis xiphoidea, belongs to an extinct group of jawless marine and freshwater fish called galeaspids, characterized by their big and bizzare head-shields. The species swam in [...] —> Read More