Gibbula tryoni Pilsbry, 1890

Gibbula tryoni Pilsbry, 1890 in 1889 – 1890: 239, pl. 69, figs 20, 21. G.B. Sowerby (III), 1897: 18, pl. 6, fig. 22. Bartsch, 1915: 159. Barnard, 1963a: 280, fig. 18m. Kensley, 1973: 40, fig. 83. Richards, 1981: 35, pl. 8, fig. 60. Kilburn & Rippey, 1982: 41, pl. 8, fig. 16. Springsteen, 1982: 2, fig. 19. Steyn & Lussi, 1998: 20, fig. 54. Marais, 2011: 62. Type loc.: Cape of Good Hope; five syntypes in ANSP (38093).

Gibbula incincta G.B. Sowerby (III), 1894: 372. G.B. Sowerby (III), 1897: 18 [= G. t r y o n i]. Type loc.: Port Elizabeth; location of type material unknown (could not be found in NHM, Salvador pers. comm. iii/2015).

Gibbula aglaia Bartsch, 1915: 158, pl. 27, figs 1–3. Type loc.: Cape of Good Hope; holotype in USNM (102730).

Gibbula medusa Bartsch, 1915: 159, pl. 29, figs 7–9. Type loc.: Cape of Good Hope; holotype in USNM (43011).

Distribution. KwaZulu-Natal north coast (Tongaat) to Port Alfred and perhaps Port Elizabeth; living mostly shallow subtidal, occasionally low intertidal.