'It quickly became obvious that not only it wasn’t a jellyfish, but turned upside down, it was clearly an anemone.'
The fossils are from northern Illinois' Mazon Creek fossil beds dating back 310 million years. A site with outstanding fossil preservation is known as a Lagerstätte, and Mazon Creek has earned this designation.
“These fossils are better preserved than Twinkies after an apocalypse. In part, that’s because many of them burrowed into the seafloor as they were being buried by a stormy avalanche of mud,” said study co-author James Hagadorn, an expert on unusual fossil preservation at the Denver Museum of Nature and Science.
, but turned upside down, it was clearly an anemone, probably one that burrowed into the seafloor. The ‘bell’ was actually an expanded muscular foot used to wiggle the anemone into the seafloor,” Plotnick said.'s barrel-shaped body served as a sturdy "curtain." Another species of fossil jellyfish resembling a flower was a unique anemone stomped as an aluminum can from top to bottom.
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