Input (grade 13): The Order Archaeognatha has previously been combined with the Order Thysanura, or bristletails, both of which groups possess three-pronged tails comprising two cerci and an epiproct.
Output (grade 8): The Order Archaeognatha has previously been combined with the Order Thysanura, or bristletails. Both groups have three-pronged tails with two cerci and an epiproct.