Triassic-Period Protozoan Preserved in Cocoon for Over 200 Million Years

Cocoons form to protect eggs and larvae, but they can also help preserve fossils for hundreds of millions of years. This 25-micrometer-long protozoan was trapped in the wall of an egg case produced by a leech between 200 million and 215 million years ago, during the Triassic Period.

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Mesodinium Chamaeleon Is A Unique Life Form That is Half Plant Half Animal


In nature, you’ll find animals that undergo vast transformations, becoming almost unrecognizable in their new forms. Examples like caterpillars becoming butterflies and tadpoles becoming frogs almost look like distinct animals in the different stages of their evolution.

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