Student Project Figures Figure 5 Four development pathways seen across the phylum Sipuncula. Type 1: Direct development. Type 2: Pelagic lecithotrophoc trochophore that becomes a vermiform phase. Type 3: Pelagic lecithotrophic trochophore metamorphoses into a lecithotrophic pelagosphera larva that changes into a vermiform phase. Type 4: (The development pathway for Aspidosiphon) Pelagic lecithotrophic trchophore metamorphoses into a planktotrophic pelagosphera larva. After period of time in plankton it metamorphoses into a vermiform juvenile. (After Cutler, 1994, pp 305) Figure 4 Figure 5 Figure 6 Figure 7 Figure 8