Snodgrass, R.E. (1948). The feeding organs of Arachnida, including mites and ticks. Smithsonian Miscellaneous Collections 110(10): 1–93.
| Taxon | |
|---|---|
| Eukoenenia mirabilis (Grassi and Calandruccio, 1885) (Palpigradi: Eukoeneniidae) | n/a, figs 6a, b, d, Koenenia mirabilis |
| Prokoenenia wheeleri (Rucker, 1901) (Palpigradi: Prokoeneniidae) | n/a, fig. 6c, Prokoenenia wheeleri (Rucker) |