I am not that familiar with work on homologies between different arthropod classes, but it is a pretty contentious subject and I would not assume that, say, the tibia of an insect was necessarily evolutionarily homologous with the tibia of an arachnid.Embiopterans are part of the Polyneoptera, the basal group of Neoptera (the clade of all living insects except dragonflies and mayflies, distinguished