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An animal that was thought extinct for the past 4 million years has resurfaced

Dragos MitricabyDragos Mitrica
July 14, 2014
in Animals, Biology, Science
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Artist’s impression of living Protulophila polyps in a worm tube. Dennis Gordon and Erika MacKay [NIWA].
Artist’s impression of living Protulophila polyps in a worm tube. Dennis Gordon and Erika MacKay [NIWA].
Talk about a comeback! An international group of scientists report they’ve encountered evidence that suggests a long lost marine animal whose lineage can be traced back hundreds of millions of years ago and which was thought extinct for the past 4 million years is actually alive and well. The findings were made in Picton, New Zealand and marks a splendid demonstration of how geology, paleontology and biology join together to solve a big puzzle!

The animal is questions is called Protulophila – a tiny tentacled polyp – that was previously encountered only in fossil deposits in the northern hemisphere, specifically Europe and the Middle East. It was thought to have been extinct for four million years following a long geological history extending back 170 million years into the Middle Jurassic period in Europe.

Scientists believe Protulophila was colonial hydroid (resembling a hydra), being related to corals and sea anemones.

Scanning electron microscope photo of the openings of the ‘living fossil’ (Protulophila) in a worm tube. Photo: Paul taylor, Natural History Museum, London.
Scanning electron microscope photo of the openings of the ‘living fossil’ (Protulophila) in a worm tube. Photo: Paul taylor, Natural History Museum, London.

This year, however, an international team of researchers, comprised of scientist from New Zealand’s National Institute of Water and Atmospheric Research in Australia, London’s Natural History Museum, and the University of Oslo, found Protulophila in a tubeworm from geologically young rocks less than a million years old, while conducting fieldwork at Wanganui.

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Amazed by the finding, researchers at the NIWA decided to investigate their private collection for more insight. What they discovered was examples of preserved Protulophila that had been overlooked, some which originating from samples collected in 2008 in about 20 meters of water near the town of Picton on the northeast corner of South Island. And indeed, the findings prove the tiny tentacled polyps are indeed a colonial hydroid related to corals and sea anemones, as suspected.

“Finding living Protulophila is a rare example of how knowledge of fossils has led to the discovery of living biodiversity,” said NIWA marine biologist Dr Dennis Gordon.

“It’s very exciting. Our detective work has also suggested the possibility that Protulophila may be the missing polyp stage of a hydroid in which only the tiny planktonic jellyfish stage is known. Many hydroid species have a two-stage life cycle and often the two stages have never been matched. Our discovery may thus mean that we are solving two puzzles at once.”

Tags: extinctpaleontologypolyp

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Dragos Mitrica

Dragos Mitrica

Dragos has been working in geology for six years, and loving every minute of it. Now, his more recent focus is on paleoclimate and climatic evolution, though in his spare time, he also dedicates a lot of time to chaos theory and complex systems.

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