Figure 11. Amphiura borealis postlarval development. A, B, 0.7 in Who's who among baby brittle stars (Echinodermata: Ophiuroidea): postmetamorphic development of some North Atlantic forms

Figure 11. Amphiura borealis postlarval development. A, B, 0.7 mm dd postlarvae; A, dorsal; B, ventral, note the infradental papillae (IP = MP2); C, D, E, 0.8 mm dd postlarvae; C, dorsal; D, ventral; E, jaw, note that the IP form on the dental plate (DP); F, G, 1.1 mm dd postlarvae; F, dorsal; G, ventral; H, I, 2 mm dd postlarva; H, dorsal, note the radial shields (RS); I, ventral, note the IP on the oral plates; J, K, 2.5 mm dd juvenile; J, arm ventral, note the hatchet-shaped spine (arrow); K, ventral. Abbreviations: as in Figs 1–3, 5. Scale bars in millimetres.