Taxa included

Ludwig, M. & Alberti, G. (1990). Peculiarities of arachnid midgut glands. Acta Zoologica Fennica 190: 255–259.

Taxon
Troglostenochrus palaciosi (Reddell and Cokendolpher, 1986) (Schizomida: Hubbardiidae) 255, figs 1, 6, 10, Schizomus palaciosi
Galeodes graecus C.L. Koch, 1842 (Solifugae: Galeodidae) 255, fig. 2, Galeodes graecus
Pseudocellus boneti (Bolívar y Pieltain, 1942) (Ricinulei: Ricinoididae) 255, fig. 8, Cryptocellus boneti
Eusimonia mirabilis Roewer, 1933 (Solifugae: Karschiidae) 255, Eusimonia mirabilis
Oparbella flavescens (C.L. Koch, 1842) (Solifugae: Solpugidae) 255, Oparbella flavescens (C.L. Koch)
Neobisium (Neobisium) germanicum Beier, 1931 (Pseudoscorpiones: Neobisiidae) 255, Neobisium (Neobisium) germanicum
Prokoenenia wheeleri (Rucker, 1901) (Palpigradi: Prokoeneniidae) 255, figs 4, 7, Prokoenenia wheeleri (Rucker)