Tricolia ios Robertson, 1985

Tricolia ios Robertson, 1985: 50, pls. 29–35. Herbert, 1991c: 308, fig. 7. Moolenbeek & Dekker, 1993: 147, figs 15–18. Bosch et al., 1995: 42, fig. 99. Nangammbi, 2010: 146, figs 2.49–2.51. Type loc.: 19 km NE of Mogadishu, Somali Republic; holotype in ANSP (295535).

Distribution. Western Indian Ocean, from Somalia to the KwaZulu-Natal south coast (Aliwal Shoal); local material beach-drift to 100 m (living 5–10 m).