Sun Sep 15 14:50:01 UTC 2024: ## Ancient Fish Evolution Driven by Earth’s Shifting Plates: New Coelacanth Fossil Found

**Perth, Australia -** Scientists have discovered a remarkably preserved coelacanth fossil in Western Australia, shedding light on the evolutionary history of these enigmatic deep-sea fish. The 380-million-year-old fossil, named “Ngamugawi wirngarri” (meaning “ancient fish” in the Gooniyandi language), is the best-preserved coelacanth from the Devonian period.

This discovery, detailed in the journal Nature Communications, reveals a surprising factor driving coelacanth evolution: tectonic plate activity. Researchers found that periods of heightened seismic movement, which reshaped habitats, led to the emergence of new coelacanth species.

“We’ve known that coelacanths have been around for a long time, but this new fossil gives us a unique window into their early anatomy and evolution,” explained Dr. Alice Clement from Flinders University, lead author of the study. “We also discovered that these ancient fish weren’t just passively responding to environmental changes, but were actively evolving in response to the dynamic forces shaping the Earth’s crust.”

The study challenges the traditional understanding of coelacanth evolution, which previously focused on factors like ocean temperature or oxygen levels.

“This research highlights the crucial role that geological processes play in shaping biodiversity,” said Professor John Long, co-author of the study. “Understanding the connection between tectonic activity and evolution can provide valuable insights into the history of life on Earth and its future.”

The discovery of Ngamugawi wirngarri further underscores the importance of the Gogo Formation in Western Australia, a site renowned for its exceptional fossil record. The site continues to yield crucial information about the evolution of various ancient life forms, including early vertebrates.

While the discovery of the new fossil species adds to our understanding of coelacanth evolution, researchers acknowledge that the living coelacanth species, Latimeria chalumnae and Latimeria menadoensis, are still evolving, albeit at a slower pace than their extinct relatives.

The findings provide compelling evidence for the ongoing evolution of these fascinating “living fossils” and demonstrate the crucial role that geological forces play in shaping life on Earth.

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