Basal-neoptera
Guides
Protorthoptera
Protorthoptera is an extinct order of Palaeozoic insects first appearing in the Middle Carboniferous (late Serpukhovian or early Bashkirian). It represents a paraphyletic assemblage of basal neopteran insects rather than a true monophyletic group. The order includes the ancestors of all other polyneopterous insects. Pronotal lobes in some forms were expanded to form a shield-like structure.