Sperm cells appeared to belonging to an unknown worm-like igelart to say the least, have a few years old.
– Cocoon functions as a protective chests of embryos, sperm and eggs placed in it, says Benjamin Bomfleur.
According to him, cocoon fossils quite common and that there is now an opportunity to find others, new species.
– Each cocoon might contain microorganisms that one would not expect to find. If we analyze the entire structure we can also find out which worms were at this time and that have not left any traces.
According svt.se hitting the new discoveries the second oldest djurspermierna of ten million years.
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