Photograph: (Jung, 1989, Fig. 139.2-3) SEM image of NMB H17216. NMB locality 17451: La Bomba, Río Banano, Limón Province, Costa Rica; Río Banano fm. 1. protoconch with sigmoid outer lip and first teleoconch whorl, scale=6 mm; 2. apical view, apex somewhat damaged, scale=5 mm.
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