Sample of invertebrate gigantism in the Ordovician (same period spoken of above). Sea scorpions (eurypterids) size chart. Largest known land arthropod (Arthropleura). So it's not only spiders and not confined to the water! The past was bugged :suk:
Fossils from the Fezouata Shale. From left to right, a non-mineralized arthropod (Marrellomorpha), a palaeoscolecid worm and a trilobites. Credit: Emmanuel Martin Discoveries at a major new fossil site in Morocco suggest giant arthropods—relatives of modern creatures including shrimps, insects...
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