Despite being abundant on the ocean floor, sea anemones are among the most elusive fossils due to their soft bodies lacking hard parts that can be easily fossilized. However, a group of paleontologists has recently uncovered that countless sea anemone fossils have been hiding in plain sight for almo
University of Illinois Chicago’s
The fossils come from the 310-million-year-old Mazon Creek fossil deposits of northern Illinois. Mazon Creek is a world-famous Lagerstätte, a term used by paleontologists to describe a site with exceptional fossil preservation. An ancient delta allowed the detailed preservation of the Mazon Creek soft-bodied organisms because millions of anemones and other animals were rapidly buried in muddy sediments.“These fossils are better preserved than Twinkies after an apocalypse.
Plotnick said that Foster also suggested that a small snail sometimes found in the skirt was a predator, similar to snails that prey on jellyfish in modern oceans. “Although most of these fossils are preserved as decomposing blobs that look like a piece of used gum on the sidewalk, some specimens are so superbly preserved that we can even see the muscles that the anemones used to bend and contract their bodies,” said study co-author Graham Young, an expert on fossil jellyfish from the Manitoba Museum.
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