Discodoris boholiensis Bergh, 1877
Discodoris boholiensis Bergh, 1877b: 519, pl. 60 fig. 23, pl. 61 figs 6-12; Bergh, 1890: 897, pl. 87 figs 28-31 (Edam, Indonesia); Bergh, 1905: 99, pl. 1 fig. 9 and others (Ambon, Indonesia); Lim & Chou, 1970: 88, fig. 7E; Valdés, 2002: 565, figs 4d, 15, 16; Dayrat, 2010: 44, figs 3-11.
Material.— RMNH.MOL.131659, RBE Stn 1, W side Hunut, Hitu, 4 m depth “on wooden plank,” 11.xi.1990, 38 × 23 mm pres., leg. and photos W. Kolvoort (specimen 1: complicated dorsal pattern, hyponotum and foot creamy yellow with dark brown edging); RMNH.MOL.131657, RBE Stn 1, W side Hunut, Hitu, 5 m depth, 11.xii.1990, leg. K. van Egmond, 40 × 25 mm pres., photos M. Lavaleye 51-10/16, 56-20 (specimen 2: very soft, thin mantle margin, brown with very dark brown ridge and edge, ventral side as 1); RMNH.MOL.131660, RBE Stn 1, W side Hunut, Hitu, 3 m depth, “on pole among various organisms,” 10.xi.1990, leg. W. Kolvoort, 48 × 30 mm pres., photos M. Lavaleye 7-24/25 (specimen 3: very soft, damaged mantle margins, missing piece bottom right); RMNH.MOL.131661, RBE Stn 1, W side Hunut, Hitu, 3-5 m depth, 7-8.xi.1990, leg. W. Kolvoort, 10 × 7 mm pres. & curled, photos M. Lavaleye 12-25/26 (specimen 4: soft, missing piece upper left); RMNH.MOL.131658, Hatuhuran, Piru Bay, Ceram, 2 m depth, 28-30.xi.1997, 25 × 15 mm pres., leg. & photo H. Strack (specimen 5: folded over, soft, but more or less intact).
Non-Indonesian material.— CASIZ 173750, Bohol, Philippines, ix.2003, 35 mm specimen, leg. & photos J. Hinterkircher.
Description.— These specimens are all recognizable as Discodoris boholiensis but show individual variation, to be expected of such a complicated colour pattern. The oval body has an irregular outline and is extremely flat with a short and narrow prominent central ridge. The basic colour was reddish brown, patchily distributed, with the tips of the smallest pustules dark brown, red, and white. There was a zigzag white line along the central ridge, and the edge of the mantle was white (pl. 4 fig. 1). The gills and rhinophores were red with white lines up the central axes and speckles on the lamellae, and the tips of the rhinophores were white (pl. 4 fig. 2). The sole of the foot and the hyponotum of the preserved specimens are creamy yellow with brown pigmentation along their edges. The oral tentacles are very long with brown pigment intensifying distally (pl. 4 fig. 3).
Remarks.— It is noteworthy that all the RBE specimens were found at the same station, on different dates, and not at any other station. This station comprised a wooden jetty covered in encrusting invertebrates, clearly an ideal habitat for D. boholiensis. Bergh described D. boholiensis from Ambon (1905) and Edam (1890). There are few records of this species further west than Indonesia and the Philippines (where it is common) but it has been recorded from the western Indian Ocean (see Dayrat, 2010, for summary).