Fig. 6

Scanning electron microscopic images of chaetal characters in Hydroides. A, B – Thoracic chaetae in H. glasbyi W.46916 (A) and in H. brachyacantha AM W.46940 (B); C, D – Thoracic saw-shaped uncini in H. nikae AM W.46916 (C) and in H. glasbyi AM W.46892 (D); E, F – Abdominal flat trumpet-shaped chaetae in H. nikae AM W46916 (E) and H. glasbyi AM W.46892 (F). Inset: left – light microscopy image of abdominal chaeta of H. dolabrus giving an impression of two rows of teeth (photo A. Tovar-Hernandez); right – a typical line drawing interpretation (trumpet-shaped chaeta) of light microscopy image of abdominal neurochaeta of H. alatalateralis by Jones (1962); G, H – capillary chaetae and rasp-shaped uncini of posterior abdomen (G) and close-up view of posterior abdominal rasp-shaped uncini (H) in H. amri AM W.25496 (all photos S. Lindsay).