PICTURED: Dr. Eamon Doyle, Dr. Joseph Botting and Dr. Lucy Muir with the new fossil sponges discovered near the Cliffs of Moher

An extraordinary new species of fossil sponge dating back to a time when County Clare was located close to the Equator has been discovered in the rocks that make up the Cliffs of Moher by Dr. Eamon Doyle, geologist for the Burren and Cliffs of Moher UNESCO Global Geopark. 

The 315-million-year-old sponge, named Cyathophycus balori, is up to 50cm tall and is the largest known example of its kind anywhere in the world.

When it was alive the vase-shaped sponge featured a circular opening at the top surrounded by a ring of eyelash-like structures. It would have resembled the modern-day Venus Flower Basket sponge, which is found the Pacific Ocean and often features on deep sea wildlife documentaries.

The new species was named after the mythological giant Balor, whose eye wreaked havoc on his enemies when opened.

Commenting on his discovery, Dr. Doyle said, “This is an exceptionally large example of a type of fossil sponge that was previously only known from much older rocks elsewhere in the world. It is the first record of this type of fossil sponge from Ireland and its excellent preservation is highly unusual.”

He continued, “The sponge was originally composed of a rectangular meshwork of tiny spicules made of silica, held together by a thin organic membrane. When they die, they usually fall apart quickly, and often only scattered remains of the spicules are preserved as fossils, so I was delighted to find these largely intact specimens.”

“The excellently preserved fossil dates back to a time when the Atlantic Ocean had not even started to form and what we now call County Clare was part of an earlier sea, located near the Equator,” explained Dr. Doyle. “Discoveries like this help us to promote awareness about the wonderful geological legacy we have on our doorstop here in County Clare and to encourage a new generation of palaeontologists, that is, geologists that specialise in the study of fossils to visit and learn more about the unique geology of Ireland’s west coast.”

The new discovery has been published in the latest edition of international geological journal Geobios, with the collaboration of lead author and international fossil sponge expert Dr. Joseph Botting and co-author Dr. Lucy Muir, both Honorary Research Fellows at National Museum Wales (Amgueddfa Cymru), who worked closely with Dr. Doyle.

According to Dr. Botting, “I was amazed to see the size and excellent state of preservation of this fossil; this was totally unexpected. This find offers important insights into the evolution of sponges and how some species can survive in niche environments where few other species can live. Finding such large and intact specimens is exceptional.”

Dr. Lucy Muir commented, “This is a wonderful find and reminds us that there are still new and interesting fossils to be found which help us understand the story of Life on Earth.”

Sponges are creatures with a very basic body plan, they do not have a nervous system or circulatory system, but they are very abundant and form an important part of our biodiversity today. They filter large volumes of water for microscopic organisms that they feed on.

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If you’re here, you care about County Clare. So do we. Did you rely on us for Covid-19 updates, follow our election coverage, or visit The Clare Echo every week for breaking news and sport? The Clare Echo invests in local journalism and we want to safeguard its future in our county. By becoming a subscriber you are supporting what we do, will receive access to all our premium articles and a better experience, while helping us improve our offering to you. Subscribe to clareecho.ie and get the first six months for just €3 a month (less than 75c per week), and thereafter €8 per month. Cancel anytime, limited time offer. T&Cs Apply. www.clareecho.ie.

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