Giant Spider Fossil Unearthed in Australia

Australia is full of fascinating stories hidden beneath its arid surface. Over time, the continent has been home to a diverse range of creatures and ecosystems. One recent discovery that stands out is the fossil of a giant spider, shedding light on Australia’s unique past.

This remarkable find comes from Gulgong, New South Wales, a region that was once covered in lush rainforests. Scientists have uncovered the fossil of a massive spider, making it the first-ever fossil of a large brush-footed trapdoor spider from the Barychelidae family.

The Discovery in McGraths Flat

The fossil was found at a fossil site called McGraths Flat in the Central Tablelands of NSW. This site is known for its exceptionally preserved fossils.

A team of scientists, led by Matthew McCurry, a paleontology expert at the University of New South Wales and the Australian Museum Research Institute, officially named the spider species “Megamonodontium mccluskyi.” It lived around 11 to 16 million years ago during the Miocene era.

McCurry explained the significance of this discovery, noting that very few spider fossils have been found in Australia. In fact, only four spider fossils have ever been discovered on the entire continent, making it challenging for scientists to understand their evolutionary history.

“This is why this discovery is so important; it reveals new information about spiders, their extinction, and fills gaps in our understanding of the past,” McCurry said.

Unique Characteristics of the Giant Spider Fossil

Robert Raven, an arachnology expert from the Queensland Museum, mentioned that there are approximately 300 species of brush-footed trapdoor spiders that exist today, but none of them leave fossil traces.r

Professor Michael Frese from the University of Canberra explained that these creatures have hair-like structures on their bodies that can sense chemicals and vibrations. These abilities help them protect themselves from threats and even create sounds.

What makes this discovery even more intriguing is the type of rock found in the fossil layer, known as goethite, which is rich in iron. The preservation of the fossil is incredibly detailed, allowing researchers to observe small details on the spider’s body, despite it being larger than modern Monodontium spiders of a similar kind.


While Megamonodontium mccluskyi is not extremely large, measuring around 23.31 millimeters in body length, it’s still impressive considering Monodontium spiders are typically smaller. The larger size of this spider allowed for the preservation of intricate physical features.

Using electron microscopy, scientists were able to study small structures like claws and setae on the spider. Setae, hair-like structures on spiders, serve various functions, including the ability to sense chemicals, vibrations, protect the spider from attackers, and even create sounds.

This discovery not only marks the largest spider fossil found in Australia but also the first fossil from the Barychelidae family to be discovered worldwide, according to Raven.

Further research into this find will continue to help us understand Australia’s unique past and unravel more mysteries from this historically rich continent.

In summary, the discovery of the Megamonodontium mccluskyi fossil in Australia offers valuable insights into the continent’s ancient history and the evolution of its distinctive creatures. It also sheds light on why fossils of brush-footed trapdoor spiders are exceptionally rare.



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