Dinopedia
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Rhyniognatha is the genus of arthropod that is considered as worlds oldest insect, though some claims it would be centipede instead. It emerged very early during the Early Devonian Period, around 400 million years ago.

Like other insects of its time, Rhyniognatha presumably fed on plant sporophylls—which occur at the tips of branches and bear sporangia, the spore-producing organs. The insect’s anatomy might also give clues as to what it ate. The creature had large mandibles which may or may not have been used for hunting.

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