Diodora levicostata (E.A. Smith, 1914)

Glyphis levicostata E.A. Smith, 1914: 2, pl. 1, figs 3–5. Type loc.: Tongaat and Port Shepstone, KwaZulu-Natal; one syntype in NHM (NHMUK 1920.10.15.41), Salvador pers. comm. (iii/2015)

Fissurella sculpturata Turton, 1932: 205, pl. 53, no. 1425. Type loc.: Port Alfred, E. Cape; type material probably in OXUM, but verification required.

Diodora (Diodora) levicostata — Kilburn, 1972: 392.

Diodora levicostata —Steyn & Lussi, 1998: 10, fig. 16.

Distribution. Southern Zululand (Richards Bay) to E. Cape (Port Alfred); beach-drift to 450 m (no data for living specimens).