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Ancient Amphibian Fossil Discovered in Garden Wall Formally Identified

Science5/6/2026
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A 240-million-year-old fossil discovered in a garden retaining wall has been formally named and described by researchers. The nearly complete skeleton, named Arenaerpeton supinatus, reveals a heavyset amphibian that lived in freshwater environments. The fossil was donated to the Australian Museum and the research has been published in a scientific journal.

Facts First

  • A 240-million-year-old fossil has been formally named Arenaerpeton supinatus by researchers from the University of New South Wales (UNSW) Sydney and the Australian Museum.
  • The fossil was discovered in the 1990s by a retired chicken farmer who used rocks from a quarry to build a garden wall.
  • The specimen includes almost the entire skeleton and faint outlines of the animal's skin.
  • Arenaerpeton was a heavyset amphibian measuring about 1.2 meters long with teeth including fang-like tusks.
  • The research has been published in the Journal of Vertebrate Paleontology.

What Happened

Researchers from the University of New South Wales (UNSW) Sydney and the Australian Museum have formally identified and named a 240-million-year-old fossil discovered in the 1990s. The fossil, named Arenaerpeton supinatus, was found by a retired chicken farmer who used rocks from a nearby quarry to build a garden retaining wall. The specimen was later donated to the Australian Museum in Sydney. The fossil includes almost the entire skeleton and faint outlines of the animal's skin.

Why this Matters to You

This discovery connects you to the deep history of the land you live on, showing that the region was once home to very different life forms. It highlights how significant scientific finds can come from unexpected places, like a garden wall, and become part of a public museum collection for everyone to learn from. The detailed preservation of the fossil may provide scientists with valuable information about ancient ecosystems.

What's Next

The fossil is now part of the Australian Museum's collection, where it may be studied further or potentially put on public display. Researchers may continue to analyze the specimen to learn more about the anatomy and lifestyle of Arenaerpeton and its place in the evolutionary history of amphibians. Similar discoveries in the future could further illuminate the ancient life of the Sydney Basin.

Perspectives

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Paleontologists emphasize that the specimen is a rare and significant find due to the preservation of the head, body, and soft tissue, making it one of the most important discoveries in New South Wales in three decades.
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Evolutionary Researchers observe that the specimen shares physical similarities with the modern Chinese Giant Salamander and suggest that increasing body size in temnospondyls might have aided survival during mass extinction events.