Fig. 3. A–D, larval development of the scaphopod Antalis entalis (Linnaeus, 1758); drawings based on SEM illustrations by Wanninger and Haszprunar (2001). A. Larva 62 hours post fertilisation (hpf) in ventral aspect. B. Larva at 74.5 hpf in latero−ventral view. C. Larva at metamorphic competence in latero−ventral view, 95 hpf, oriented for comparison with Pinnocaris, Eotebenna, and Yochelcionella. D. Post−metamorphic juvenile showing the sutured protoconch and teleoconch with complete comarginal growth lines. Scale bars 100 µm (A–C), 250 µm (D). E. Eotebenna viviannae Peel, 1991 in lateral view, the thickened lines indicate gapes. F. Reconstruction of Yochelcionella based on Yochelcionella gracile Atkins and Peel, 2004. G. Scaphopod anatomy, simplified and redrawn from Reynolds (2002). E–G, not to scale.