Figure 13. Amphiura filiformis postlarval development. A, B, 0.35 in Who's who among baby brittle stars (Echinodermata: Ophiuroidea): postmetamorphic development of some North Atlantic forms

Figure 13. Amphiura filiformis postlarval development. A, B, 0.35 mm dd postlarvae; A, dorsal, note the solid plate stereom; B, ventral; C, D, 0.5 mm dd postlarva; C, dorsal, note the multilayered plate margins; D, ventral; E, F, 0.6 mm dd postlarva; E, dorsal; F, ventral, note the infradental papillae (IP = MP1); G, 1 mm dd postlarva arm ventral, note the serrated middle arm spine; H, I, 1.3 mm dd postlarva; H, dorsal; I, ventral; J, K, 1.6 mm dd postlarva; J, dorsal; K, ventral; L, 5 mm dd adult. Abbreviations: as in Figs 1–3, 5. Scale bars in millimetres.