Reference
Rico Spangenberg, Katrin Friedemann, Christiane Weirauch, Rolf Georg Beutel (2013): The head morphology of the potentially basal heteropteran lineages Enicocephalomorpha and Dipsocoromorpha (Insecta: Hemiptera: Heteroptera) – Arthropod Systematics and Phylogeny – 71: 103 - 136.