Grasshoff, M. (1978). A model of the evolution of the main Chelicerate groups. In: Merrett, P. (ed.) Arachnology: Seventh International Congress. Symposia of the Zoological Society of London Academic Press, London 42: 273–284.
| Taxon | |
|---|---|
| Pseudoscorpiones de Geer, 1778 | 282, (as Cheloneti), Chelonethi |