Ebner, R. & Beier, M. 1964. Tettigoniidae: Subfam. Ephippigerinae, Pycnogastrinae, Bradyporinae, Deracanthinae, Hetrodinae, Acridoxeninae. In Beier, M., Orthopterorum Catalogus, 2nd ed., parts 1-2. W. Junk, 's-Gravenhage: 1-101.