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Arthropods are a very old phylum, dating back to the Cambrian period (535 million years ago) and perhaps earlier. Trace fossils made by arthropods date back to 535 million years ago, and Spriggina, an enigmatic trilobite precursor which may be an arthropod, dates to 555 million years ago.
What does an arthropod use for shelter? Arthropod means jointed feet and includes arachnids, crustaceans, insects, and others. What they would use for shelter varies too greatly to list here and would be based on â¦ the environment of the specific arthropod.