Fig. 2From: Nurse egg consumption and intracapsular development in the common whelk Buccinum undatum (Linnaeus 1758)Intracapsular developmental stages of B. undatum. (a) Egg, (b) trochophore, (c) early veliger, (d) veliger, (e) pediveliger and (f) pre-hatching juvenile. n nurse egg or undeveloped embryo, om outer membrane, c cilia, vl velar lobe, m mouth, mg midgut, me mantle edge, mc mantle cavity, vm visceral mass, lh larval heart, lk larval kidney, s shell, si, siphon, sg siphonal groove, t tentacle, e eye, f foot, o operculum, sa shell apex, sr spiral ribs, ar axial ribsBack to article page