Periclimenes rotumana — Borradaile, 1898: 383. — Li, 2000: 105, fig. 115. — De Grave, 2000: 129, fig. 5. — Marin et al., 2004: 203, fig. 4 a–g. — Bruce, 2006: 18; 2007: 107. — Li and Bruce, 2006: 666. — Li et al., 2007: 240, fig. 115. — Clark et al., 2008: 96. — Hayashi, 2009: 96, fig. 4.
Palaemonella vestigialis Kemp, 1922: 123, text-fig. 1–2, pl. 3, figs. 2.
Material examined. St 3, 02/ 11 /2009, 19h– 21 h, Trévani fringing reef at night, 12 ° 43 ' 43.19 "S, 45 ° 11 ' 43.97 "E, coll. KUW fieldwork, snorkelling and scuba diving, 1–8 m, coral grounds at night, 1 female (LC 2.3 mm), MNHN-Na 16049; St 12, 06/ 11 /2009, 10h– 12 h 30, La Prévoyante reef, 12 ° 41 ' 34.70 "S, 45 ° 9 ' 59.99 "E, coll. KUW fieldwork, scuba diving 6–11 m, sediment suction pump, Acropora coral grounds, 1 ovigerous female (LC 3.0 mm), MNHN- Na 17567; St 19, 11/ 11 /2009, 15h– 17 h, islet Handrema, north, 12 ° 40 '21.00"S, 45 ° 6 ' 49.92 "E, coll. KUW fieldwork, scuba diving 6–10 m, sediment suction pump, fringing reef and outer slope, coral grounds, 1 male (LC 2.8 mm), 1 female (LC 3.0 mm), MNHN-Na 16042; St 25, 14/ 11 /09, 10 h– 11 h 30, islet M'tzamboro, southern tip, 12 ° 39 ' 30.18 "S, 45 ° 1 ' 38.65 "E, coll. KUW fieldwork, scuba diving 15–20 m, coral slope with boulders, 1 ovigerous female (LC 2.7 mm), MNHN-Na 17574; St 32, 19/ 11 /2009, 10h 30 – 12 h00, islet M'tzamboro, north-eastern, 12 ° 38 ' 9.54 "S, 45 ° 2 ' 27.12 "E, coll. KUW fieldwork, scuba diving 6–21 m, Acropora coral boulders, 1 male (LC 3.2 mm), MNHN-Na 17555.
Distribution. Type locality Rotuma, Fiji Islands. Widespread from Indo-Pacific region, even in the eastern Mediterranean Sea.
Remarks. The specimens agree well with the previous descriptions and illustrations. The species was not previously recorded from Mayotte with certainty, although it ranges widely in the Indo-Pacific region. The specimen of MNHN-Na 17567 was collected together with 1 female of Harpilius consobrinus De Man, 1902 (MNHN-Na 17568) and 1 female of Periclimenaeus zanzibaricus Bruce, 1969 (MNHN-Na 17569) at station 12. The specimen of MNHN-Na 16049 was collected together with 1 male of Cuapetes tenuipes (Borradaile, 1898) (MNHN-Na 16041) and 3 ovigerous females of Jocaste japonica (Ortmann, 1890) (MNHN-Na 17063) at Station 3. The specimen of MNHN-Na 17555 was collected together with 1 male of Harpiliopsis depressa (Stimpson, 1860) (MNHN- Na 16061) at Station 32.