The use of the term Dictyoptera has changed over the years, and while largely out of use for much of the last century, it is becoming more widely used. It is usually considered a superorder, with Isoptera, Blattaria and Mantodea being its three orders. In some classifications, however, Dictyoptera is shifted to order status. Regardless, in all classifications the three constituent groups are the same, just treated at different rank. Termites and roaches are very closely related, with ecological and molecular data pointing to a relationship with the roach genus Cryptocercus (Lo et al., 2000.).
Based on genetic evidence, the closest living relatives of the Dictyoptera are the phasmids and the enigmatic groups Mantophasmatodea and Grylloblattodea. If the Dictyoptera are considered a superorder these three orders might be included in it (Cameron et al, 2006).