Pseudopaguristes shidarai Asakura, 2004

(Fig. 1C)

Pseudopaguristes shidarai Asakura, 2004: 153, fig. 1–12 (type locality: Miyako Island, Ryukyu Islands) .

Material examined. Okinawa Island, Hedo Dome cave: main tube, 22 May 2017, 1 male (sl 2.6 mm), RUMF- ZC-6020 (HD2017-140) . Shimoji Island, Akuma-no-Yakata cave: entrance, 1 September 2017, 1 female (sl 2.3 mm), RUMF-ZC-6021 (SH105) .

Distribution. Ryukyu Islands (Okinawa Island, Kume Island, Miyako Island, and Shimoji Island) in southwestern Japan; 20–40 m (Asakura 2004; Rahayu & Osawa 2012; present study) .

Habitat. Coral reefs; fore-reef slopes (Rahayu & Osawa 2012).

Remarks. In the Ryukyu Islands, P. shidarai has been recorded from cryptic environments of the shallow coral reefs such as small crevices and horizontal holes, and submarine caves (Rahayu & Osawa 2012; Osawa & Fujita 2016; Table 2).