Taxa included

Morikawa, K. (1955a). Pseudoscorpions of forest soil in Shikoku. Memoirs of Ehime University (2B) 2: 215–222.

Taxon
Allochthonius (Allochthonius) opticus (Ellingsen, 1907) (Pseudoscorpiones: Pseudotyrannochthoniidae) 215–216, Allochthonius opticus (Ellingsen)
Mundochthonius japonicus Chamberlin, 1929 (Pseudoscorpiones: Chthoniidae) 216, Mundochthonius japonicus
Tyrannochthonius japonicus (Ellingsen, 1907) (Pseudoscorpiones: Chthoniidae) 216, (misidentification), Tyrannochthonius dogoensis Morikawa
Tyrannochthonius japonicus dogoensis Morikawa, 1954 (Pseudoscorpiones: Chthoniidae) 216, (misidentification; see Tyrannochthonius japonicus (Ellingsen)), Tyrannochthonius dogoensis Morikawa
Microcreagris cyclica Kishida, 1928 (Pseudoscorpiones: Neobisiidae) 216–217, Microcreagris cyclica
Microcreagris macropalpus Morikawa, 1955 (Pseudoscorpiones: Neobisiidae) 217–219, figs 1a, 2a–b, 3b, Microcreagris pygmaeum macropalpus
Microcreagris microdivergens Morikawa, 1955 (Pseudoscorpiones: Neobisiidae) 219–220, figs 2c–d, 3c, Microcreagris microdivergens
Microcreagris pseudoformosa Morikawa, 1955 (Pseudoscorpiones: Neobisiidae) 221, figs 1b, 2i-j, 3e, Microcreagris pseudoformosa
Parobisium magnum ohuyeanum (Morikawa, 1952) (Pseudoscorpiones: Neobisiidae) 221–222, Neobisium (Parobisium) ohuyeanum
Allochernes japonicus (Morikawa, 1953) (Pseudoscorpiones: Chernetidae) 222, Toxochernes dubius japonicus Morikawa
Pararoncus japonicus (Ellingsen, 1907) (Pseudoscorpiones: Syarinidae) 222, Roncus (Roncus) japonicus (Ellingsen)