Mazoscolopendra
Mazoscolopendra is an extinct genus of scolopendromorph centipedes, and the oldest known member of that order. It existed during the Carboniferous in what is now Illinois.
With length up to, this centipede had 21 pedal segments. Although family it belongs to is uncertain, in the original description it is suggested that is close to Cryptopidae than to Scolopendridae.