Palaeodictyopterids were approximately 21 cm long with a wingspan of approximately 18cm.
Palaeodictyopterids were insects related to dragonflies and mayflies. They first appeared in the Early Carboniferous, and became diverse and abundant until their extinction at the end of the Permian. They had elongated, sharp mouthparts for piercing and sucking plant tissue. As well as their large wings, they had a pair of ‘paranota’ or winglets, which didn’t function as wings during flight.