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leg breathing (trilobites)

Researchers: Trilobites breathed through their legs

How this finding situates trilobites "more securely in between older arthropods ... and crustaceans" is unclear. Apparently, crustaceans don’t breathe through their legs. Did the older arthropods breathe through THEIR legs? In any event, this find implies that the crustaceans underwent a dramatic switch in breathing mechanics, of which we apparently don’t have an account. How could we? We only found out about what the trilobites do very recently. Read More ›