Thorunna horologia Rudman, 1984

(Figure 13 B)

Material examined. Six specimens. MB28-004609, ZRP, 17 Aug. 2012, 1m, 9mm (no photo); MB28-004686, ZM, 16 Jun 2013, 8m, 12mm; MB28-004982, ZRP, 24 Apr. 2015, 1m, 7mm; MB28-005 0 0 6, ZA51, 12 Jun. 2015, 11m, 8mm; MHN-YT1569, ZA51, 12 Jun. 2015, 11m, 8mm; ZMBN119700, ZRP, 0 4 Aug. 2015, 1m, 14mm.

Habitats. Subtropical tidal reefs and rocky reefs.

Occurrences. Zavora.

Geographic distribution. Western Indian Ocean. India (Sreeraj 2011) , Réunion Island, Madagascar (Gosliner et al. 2008), Tanzania (Rudman 1984), South Africa (Gosliner 1987) and Mozambique .

Remarks. Photographic records of specimens of a similar appeareance exist for India (Sreeraj 2011) and Thailand (Chatcharkorn 2011) suggesting a broader distribution. Nevertheless, Gosliner et al. (2015) consider T. horologia to be restricted to the western Indian Ocean and illustrate a similar species considered undescribed for the western Pacific Ocean (Thoruna sp. 1, left bottom picture, pg. 249). Thus, the correct distribution of this species can only be confirmed after examination of similar specimens from the Pacific Ocean.