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.

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 ...

Oregon Zoo has welcomed 25 rare Pacific lamprey – a 400-million-year-old species native to the Pacific Northwest. The effort ...

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 ...

Early jawless fish were likely to have used bony projections surrounding their mouths to modify the mouth's shape while they collected food. Experts have used CT scanning techniques to build up ...

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

Armored and jawless Jawless fishes from the Ordovician Period — 488.3 million to 443.7 million years ago — are called ostracoderms, after their armored skin, and most of them are known from ...

(CNN) — Hundreds of millions of years ago, jawless fishes swam Earth’s seas, their brains protected on the outside by armored skin, and on the inside by plates made of cartilage.