A Rosetta Stone for eastern Pacific Caecidae (Gastropoda: Caenogastropoda)
FIGURE 33. Caecum heptagonum. A–C. Profile views depicting sculpture variations (LACM 1976-7.15). D. Ventral view (SBMNH 452511). E. Holotype, NHMUK 1857.6.4.1524. F. Operculum, exterior surface (SBMNH 452511). G. Operculum, interior surface (SBMNH 452511).
FIGURE 34. Caecum heptagonum shells at different growth stages. A. Protoconch and teleoconchs I to III (LACM 1968- 13.30). B. Surface of teleoconch I (LACM 1968-13.30). C. Surface of teleoconch II (LACM 1968-13.30). D. Teleoconchs II to IV (LACM 1968-13.30). E. Surface of teleoconch III (SBMNH 452511). F. Surface of teleoconch IV (SBMNH 452511). G. Teleoconchs III to IV (SBMNH 452511). H. Teleoconchs IV to V (SBMNH 452511). I. Surface of teleoconch V (SBMNH 452511). J. Surface of teleoconch VI (SBMNH 452511). K. Teleoconchs V to VI (SBMNH 452511). L. Teleoconch VI (LACM 1976-7.15).
FIGURE 36. Caecum insculptum. A. Profile view with periostracum (LACM 1972-57.44). B. Profile view without periostracum (LACM 1972-57.44). C. Ventral view (LACM 1972-58.63). D. Operculum, exterior surface (LACM 1972-57.44). E. Operculum, interior surface (LACM 1972-57.44). F. Syntype, NHMUK 1857.6.4.1514. G. C. mirabile, syntype, MNHN-IM- 2000-4593.
FIGURE 35. Caecum heptagonum. A. Conceptual reconstruction of growth stages. B. Species distribution map.