A newfound fossil of a jawless fish is the oldest known vertebrate cranium preserved in 3D. The 455 million-year-old find could illuminate how vertebrate heads evolved.

Fossils of early jawless fish, in contrast, lack any signs of synovial joints. “Fossils from the extinct clades along the [jawed fish] ...

Ancient fish fossils highlight the strangeness of our vertebrate ancestors. Nearly 440-million-year-old finds from China are of some of the first vertebrates with jaws ...

Jawless fish brains more similar to ours than previously thought Date: February 15, 2016 Source: RIKEN Summary: Researchers have shown that complex divisions in the vertebrate brain first appeared ...

Jawless, bloodsucking fish could help us understand how humans and all other vertebrates evolved, scientists say. Turns out, lampreys — notable for their lack of jaw and generally terrifying ...

The most ancient fish were jawless, and since our whole group has jaws, we can safely choose a jawless fish as a fairly recent ancestor. Unfortunately, this ancestor is long dead.