Paguristes jalur Morgan, 1992

(Fig. 1B)

Paguristes jalur Morgan, 1992: 167, figs. 1, 2 (type locality: Horburgh Island, Cocos (Keeling) Islands).— Osawa & Takeda 2004: 1099, figs. 1–4.—McLaughlin 2007: 216, fig. 11.

Material examined. Ie Island, unnamed submarine cave: main tube, near bifurcation of tube, 9 September 2016, 1 male (sl 5.4 mm), RUMF-ZC-6012 (IE 69). Okinawa Island, Hedo Dome cave: main tube, 12 August 2016, 1 male (sl 5.5 mm), RUMF-ZC-6015 (HD 2016-69); same data as RUMF-ZC-6015, 3 males (sl 4.6–6.3 mm),

4 females (sl 2.6–5.2 mm), 4 ovigerous females (sl 3.7–5.5 mm), RUMF-ZC-6016 (HD 2016-70 –80); main tube, 30 m from entrance, area of rocks, 12 August 2016, 3 males (sl 4.0–5.0 mm), 1 ovigerous female (sl 5.8 mm), RUMF- ZC-6017 (HD 2016-89 –92); main tube, 21 May 2017, 3 males (sl 2.5–5.9 mm), 1 female (sl 5.1 mm), RUMF-ZC- 6018 (HD 2017-84); same data as RUMF-ZC-6018, 1 females (sl 5.3 mm), RUMF-ZC-6019 (HD 2017-89). Shimoji Island, Akuma-no-Yakata cave: entrance, 4 February 2017 , 1 female (sl 6.3 mm), RUMF-ZC-6013 (SH53); same data as RUMF-ZC-6013, 1 male (sl 5.7 mm), RUMF-ZC-6014 (SH 54).

Distribution. Eastern Indian Ocean: Cocos (Keeling) Islands and Christmas Island; western Pacific: Guam and Ryukyu Islands in southwestern Japan; 2–37 m (McLaughlin 2007).

Habitat. Coral reefs; submarine caves and small crevices or horizontal holes on fore-reef slopes (Osawa & Takeda 2004).

Remarks. Paguristes jalur is the sole species of the genus recorded from shallow coral reef environments including submarine caves in the Ryukyu Islands (Osawa & Takeda 2004; Table 2). This species has been often found in small crevices or horizontal holes on fore-reef slopes of the islands, accompanied by Pylopaguropsis fimbriata with similarly red stripes on the ambulatory legs.