Taxa included

Sakayori, H. (1990). [Distribution of soil-dwelling pseudoscorpions in lowland forests at the northern district of the Kanto Plains]. Edaphologia 43: 31–40.

Mundochthonius japonicus Chamberlin, 1929 (Pseudoscorpiones: Chthoniidae) 33, fig. 2E, Mundochthonius japonicus
Tyrannochthonius japonicus (Ellingsen, 1907) (Pseudoscorpiones: Chthoniidae) 33, fig. 2A, Tyrannochthonius japonicus (Ellingsen)
Allochthonius (Allochthonius) opticus (Ellingsen, 1907) (Pseudoscorpiones: Pseudotyrannochthoniidae) 33, fig. 2F, Allochthonius opticus (Ellingsen)
Microbisium pygmaeum (Ellingsen, 1907) (Pseudoscorpiones: Neobisiidae) 33, fig. 2B, Microbisium pygmaeum (Ellingsen)
Pararoncus japonicus (Ellingsen, 1907) (Pseudoscorpiones: Syarinidae) 33, fig. 2C, Roncus japonicus (Ellingsen)
Parobisium magnum (Chamberlin, 1930) (Pseudoscorpiones: Neobisiidae) 33, fig. 2D, Neobisium (Parobisium) magnum