As it stands, the relationship of the two living Paleopteran groups – Ephemeroptera (mayflies) and Odonata (dragonflies and damselflies) – to the Neoptera has not been resolved yet; there are three competing main hypotheses with many variations.
Como isto indica, as relacións dos dous grupos de paleópteros (Ephemeroptera e Odonata) cos Neoptera non foron resoltas aínda; hai tres hipóteses principais en competencia con moitas variacións.