(in German) Beier, 1932: Pseudoscorpionidea I. Subord. Chthoniinea et Neobisiinea. Tierreich, vol.57, p.1-258.
(in English) Chamberlin, 1930: A synoptic classification of the false scorpions or chela-spinners, with a report on a cosmopolitan collection of the same. Part II. The Diplosphyronida (Arachnida-Chelonethida). Annals and Magazine of Natural History, ser. 10, n. 5, p.1-48 & 585-620.