Scanning electron microscopy images of operculum (A–H) and chaetae (I–M) of Spirobranchus akitsushima sp. nov. A–D ventral view of endplate E–H lateral view. Note that some endplates are with a rounded swelling (sw), B–D. I thoracic capillary chaetae, scales are in close-up J thoracic uncini K abdominal true trumpet-shaped chaetae L abdominal uncini. Scale bars: 0.1 mm (A–H); 0.01 mm (I–L).

  Part of: Nishi E, Abe H, Tanaka K, Jimi N, Kupriyanova EK (2022) A new species of the Spirobranchus kraussii complex, S. akitsushima (Annelida, Polychaeta, Serpulidae), from the rocky intertidal zone of Japan. ZooKeys 1100: 1-28.