Hypothesis in the reconstruction of growth stages and synonyms of Caecum floridanum: A Protoconch to teleoconch IV B Sculpture of teleoconch I C Sculpture of teleoconch II to IV D C. irregular, teleoconch IV (syntype – MNHN 25729) E C. phronimum at different growth stages, teleoconch II to III (syntype – MNHN 25728) F Caecum compactum, teleoconch IV (USNM 83590) G–H C. puntagordanum (holotype – PRI 26107 and paratype – PRI 26108, respectively), teleoconch IV. Measures and scale bars: A protoconch and first half of teleoconch I (Bandel 1996: pl. 7, fig. 7, 0.7 mm), second half of teleoconch II to III (200 µm), teleoconch IV (500 µm), 100 µm (B–C), 500 µm (D–E), 1 mm (F–H)