Tricolia retrolineata Nangammbi & Herbert, 2008 Tricolia retrolineata Nangammbi & Herbert, 2008: 14, figs 1–12, 15 – 17. Nangammbi, 2010: 171, figs 2.61–2.64. Type loc.: Mozambique, Ponta do Ouro (26.850 °S: 32.917 °E), subtidal reef, ca 20 m; holotype in NMSA (L 5938 /T 2238). Distribution. Southern Mozambique (Malongane) to northern Pondoland (Mzamba); beach-drift to 26 m, mostly associated with subtidal reefs (living 7–11 m).Published as part of Herbert, David G., 2015, An annotated catalogue and bibliography of the taxonomy, synonymy and distribution of the Recent Vetigastropoda of South Africa (Mollusca), pp. 1-98 in Zootaxa 4049 (1) on page 81, DOI: 10.11646/zootaxa.4049.1.1, http://zenodo.org/record/24536