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Fig. 2 | Helgoland Marine Research

Fig. 2

From: Nurse egg consumption and intracapsular development in the common whelk Buccinum undatum (Linnaeus 1758)

Fig. 2

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 ribs

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