Opisthobranchs from the western Indian Ocean, with descriptions of two new species and ten new records (Mollusca, Gastropoda) Author Yonow, Nathalie text ZooKeys 2012 197 1 130 http://dx.doi.org/10.3897/zookeys.197.1728 journal article http://dx.doi.org/10.3897/zookeys.197.1728 1313-2970-197-1 Phyllidiella rosans (Bergh, 1873) Fig. 22Plate 69 Phyllidiella rosans . - Brunckhorst 1993 : 56, pl. 6C, D (Maldives, La Reunion , Mauritius); Yonow et al. 2002 : 864, figs. 16e, 17a (Chagos); Apte 2009 : 172, fig. 2w (Laccadive Islands). Material. Maldives: two pres. specimens 52 x 16 mm and 27 x 16 mm (with 3 median lines and 2 rings), Gangehi Island lagoon, Ari Atoll, 1-5 m depth, February 1988, leg. G Corriero; 16 x 11 mm (3 median lines and 2 rings), Gangehi Island lagoon, Ari Atoll, <5 m depth, August 1990, leg. Cabona; 43 x 14 mm (NY-4 "green ridges, tubercles in 3 median lines + 3 rings, long black anal papilla, long black rhinophores"), Bodhuhithi Channel, North Male Atoll, 21.5 m depth, 11 May 1990, leg N Yonow; 21 x 14 mm pres., curled (NY-19 "3 median line of tubercles + 3 rings"), Rasfaree outer reef, North Male Atoll, 27 m depth, 13 May 1990, leg. N Yonow; 34 x 14 mm (NY- 24 "pink edge, smelly"), Kuramathi, Rasdhu Atoll, 20 m depth, 13 May 1990, leg. N Yonow; 33 x 17 mm (NY- 62) and 21 x 17 mm (NY- 63), Kandholudhu Tila, Ari Atoll, 10 m depth, 15 May 1990, leg. N Yonow; 21 x 8 mm (NY-103 "green with 3 rings"), Maaya Tila, Ari Atoll, 11 m depth, 18 May 1990, leg. N Yonow; 48 x 15 mm (NY-119 "crests in 3 lines + 2 rings, produced slimy mucus"), Tin Tila, Ari Atoll, 27 m depth, 21 May 1990, leg. N Yonow; 22 x 11 mm (NY-126 "median ridge + 3 rings"), Maayafushi Tila, Ari Atoll, 46 m depth, 22 May 1990, leg. N Yonow; 45 x 18 mm (NY-145 "green, separated grey oral tentacles, sole of foot mottled black concentrated centrally, smelly, exuded white mucus") and 40 x 16 mm (NY-146), Fulidhoo house reef, Felidhoo Atoll, 20 m depth, 12 January 1991, leg. N Yonow; four specimens 33 x 16 mm (NY-159), 30 x 11 mm (NY-160), 18 x 15 mm (NY-161) (all "green and black ringed"), 25 x 13 mm (NY-162, "pink & black, very ridged, black rhinophores"), Kunarvashi Tila, Felidhoo Atoll, 22 m depth, 14 January 1991, leg. N Yonow; six specimens 30 x 15 mm pres. curled ("3 median + 3 rings"), 42 x 18 mm pres. ("3 medians + 3 rings"), 28 x 12 mm pres. ("3 medians slightly broken"), 26 x 12 mm pres. ("3 medians + 2 rings"), 24 x 11 mm pres., 22 x 10 mm pres. (all as NY dive 42), Maaya Tila, Ari Atoll, 33 m depth, 19 January 1991, leg. N Yonow; 21 x 5 mm (NY- 208), Manta Point, North Male Atoll, 17 m depth, 21 January 1991, leg. N Yonow; numerous individuals photographed & measured but not collected, 21-52 mm, Maldives Expedition, N Yonow (see above and Yonow 1994, 1996); photographs only of many individuals, 1986-1994, J Hinterkircher. - Tanzania: photographs of numerous individuals, M'Nazi Bay, Msimbati, near Mtwara, May 1994, May 1995, IM Horsfall. - Mauritius and La Reunion : numerous photographs, 18-35 mm, http://seaslugs.free.fr/nudibranche/a_intro.htm. Figure 22. Phyllidiella rosans , 42 mm (NY dive 42), view of propodium, head, and black pigment on oral tentacles.