Scanning electron micrographs of Caecum floridanum shells at different growth stages: A–B Protoconch and teleoconch I (Bandel 1996: pl. 7, fig. 8, 0.3 mm, fig. 7, 0.7 mm, respectively) C Teleoconch II to IV (IBUFRJ 12687) D Teleoconch II to IV (IBUFRJ 12689) E Teleoconch II to IV (MORG 41.867) F Truncation region between teleoconch II and III G Truncation region between teleoconch II and III. Scale bars: 500 μm (C–E), 100 μm (F), 50 μm (G).