Figure 2. Terebellides longicaudatus Hessle, 1917. SEM micrographs from syntype SMNH 6625 in Revision of three species of Terebellides (Polychaeta: Trichobranchidae) described by C. Hessle in 1917 from the Southern Ocean

Figure 2. Terebellides longicaudatus Hessle, 1917. SEM micrographs from syntype SMNH 6625. (A) Anterior end, lateral view showing position of first notopodium (encircled) and segmental organs on 4th and 5th chaetigers (arrow); (B) Oral tentacles, distal end, detail; (C) Tufts of cilia of branchial lamellae, dorsal view; (D) Damaged margin of one branchial lamella showing internal structure of marginal efferent blood vessel; (E) Thoracic notochaetae (mostly broken) of chaetigers 10–11; (F) Broken thoracic notochaetae showing internal structure; (G) Thoracic neuropodium of chaetiger 7; (H) Thoracic uncini of chaetiger 7, upper view.