Figure 18.A–D Corona species A–B, i Corona pfeifferi (Hidalgo, 1869), syntype of Corona pfeifferi cincta Strebel, 1909 ZMB 101856 (H = 55.0) C–D, ii Corona perversa (Swainson, 1821), holotype of Orthalicus (Laeorthalicus) reginaeformis Strebel, 1909 ZMB 101824 (H = 46.9) E–H Hemibulimus species E–F, iii Hemibulimus excisus (Martens, 1885), holotype ZMB 101837 (H = 43.1) G–H, iv Hemibulimus dennisoni (Reeve, 1848), probable syntype of Porphyrobaphe (Myiorthalicus) dennisoni pallida Strebel, 1909 ZMB 117782 (H = 55.0).
