Material examined. Middle Atlas: 1♂, Grotte Izora, 19. V.2022; 1♂, Grotte Bouslama, 19. V.2022, sweep net, coll. Group Belqat, LMEE PO.
General distribution. Pericoma fallax is a European, West-Siberian, and Caucasian species (Ježek et al., 2017; Kroča & Ježek, 2019; Ježek et al., 2021; Ježek et al., 2023).
Habitat. This species (Figs 24, 25, 26, 27) develops in mosses in shaded and unshaded habitats. Our data corroborate those in the literature; we found the species in mountainous habitats, heavily shaded and rich in mosses, with the only difference being that the captures were made at the entrances and a few meters from the entrances of caves (Bouslama (Fig. 10) and Izora (Fig. 13)) in the heart of the National Park of Tazekka, a protected area.