Hypselodoris bullockii (Collingwood, 1881)

(Figures 7 H, 9 A–D)

Material examined. Six specimens. MB28-004828, 5 spcs., POA, 0 8 May 2014, 40m, 34mm; MHN-YT1671, NSS, 16 Feb. 2017, 25m, 49mm.

Habitats. Subtropical tidal reefs and tropical coral reefs.

Occurrences. Ponta do Ouro.

Geographic distribution. Indo-west, central Pacific. Marshall Islands, Japan, New Caledonia (Gosliner et al. 2008), Australia (Debelius 1996; Gosliner et al. 2008), Taiwan, Indonesia, the Philippines (Gosliner et al. 2008), Thailand (Mehrotra & Scott 2015), Christmas Island, Indonesia, Maldives (Debelius 1996) and Mozambique (King & Fraser 2014).

Remarks. Published details of the morphology of H. bullockii are relatively poor and in need of further study (Gosliner & Johnson 1999). Gosliner et al. (2015) consider H. bullockii to be restricted to the Pacific Ocean and note that records from the Indian Ocean refer to Thorunna punicea (Rudman, 1995) . Thus, to confirm the generic placement of our material, we examined the radula of one specimen (MB28-004828, Fig. 9). Despite some external similarities between Thorunna and Hypselodoris, the radular teeth of these two genera are distinctive (Rudman 1990). The radula formula of the examined specimen was 57x 47.0.47 (Fig. 9 A). Central teeth are absent (Fig. 9 B), the innermost teeth bear two to three pointed denticles of different size on the inner and four on the outer sides (Fig. 9 C). The median lateral teeth bear 3-5 denticles including one that is bicuspid (Fig. 9 D). This confirms that this species belongs to the genus Hypselodoris . Nevertheless, additional studies are needed to verify the intraspecific variability of this species.