The researchers also studied fossils of extinct fishes dating back almost 400 million years and saw evidence that some of the oldest jawed fishes had bones with joint cavities for articulated ...

A new study from the University of Chicago has uncovered the surprising origin of the flexible joints that allow us to move ...

Early jawless fish were likely to have used bony projections surrounding their mouths to modify their mouth shape while they ...

While the common ancestor of vertebrates with synovial joints is still a mystery, the oldest specimen with evidence of these ...

It does not have a true jaw, hence sometimes lampreys and a few other jawless fishes are referred to as "Agnthans", meaning literally "without jaws". Instead, the adult lamprey has "cusps" in its ...

More information: Sharma N, et al. Synovial joints were present in the common ancestor of jawed fish but lacking in jawless fish. PLOS Biology (2025). DOI: 10.1371/journal.pbio.3002990 ...

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. To compare ...

Kate Trinajstic, Curtin University The heart of modern-day jawless fish like lampreys is thought to be very much like that of the jawless fishes that were around in the Devonian period and earlier.

Jawlene, who is missing her top jaw, lives happily at Gatorland Orlando with her turtle friend after being rescued in 2023.

In this study, Sharma and colleagues examined the anatomy and development of joints in members of two early-branching vertebrate lineages: one species of jawless fish, sea lampreys, and two ...

These joint cavities can be seen in cartilaginous fish such as skates or sharks. However, when the researchers studied jawless fish such as lampreys and the hagfish, not a single synovial joint cavity ...