Fig. 6 Cnidosacs and nematocysts. a–d Transmission electron microscopic images, longitudinal sections. a in Pseudovermis paradoxus 2.0-3D microanatomy and ultrastructure of a vermiform, meiofaunal nudibranch (Gastropoda, Heterobranchia)

Fig. 6 Cnidosacs and nematocysts. a–d Transmission electron microscopic images, longitudinal sections. a Overview of an entire cnidosac. b Close-up of nematocysts. c Intact nematocyst. d Degraded nematocyst and muscular lining. clw cell wall, cp cnidophage, cw capsule wall, dnc degraded nematocyst, fi filament thread, ha harpoon, inc intact nematocyst, lu lumen, m mitochondrion, ml muscular lining, mv microvilli, nc nematocyst, nu nucleus, vac vacuole