Pivotal Ancient Fish Fossils Mark a Key Turning Point in a Slow Evolution

Researchers compare new coelacanth fossils to ones that came before and after and link evolutionary changes to tectonic activity.

By Paul Smaglik
Sep 13, 2024 4:00 PMSep 13, 2024 4:09 PM
A live recreation of the Ngamugawi wirngarri coelacanth swimming underwater in its natural habitat
A live recreation of the Ngamugawi wirngarri coelacanth in its natural habitat. (CREDIT: Illustration Katrina Kenny (courtesy Flinders University))

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Contemporary coelacanths are often described as living fossils. Superficially, that may be true. But new evidence now makes that nickname less valid.

The two species of the large-boned lungfish alive today don’t look that much different than the first known coelacanth fossil dating back over 410 million years ago. But two new fossils show that the species did evolve — albeit slowly and subtly. Also, scientists for the first time link evolution to tectonic activity, according to a report in Nature Communications.

Coelacanth Fossils Discovered in Australia

There is much to unpack in the significance of the study. First, it describes a new species of coelacanth.

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