FIGURE 3 in First record of Trochochaeta japonica (Annelida: Spionidae) in Brazil with identification key to species of the genus

FIGURE 3. Adult morphology of T. Japonica from estuary of Santos, São Paulo (MNRJ P1462). A, anterior end, dorsal view, palps missing, showing U-shaped nuchal organs on sides of caruncle, posterior border of chaetiger 1 and anterior border of chaetiger 2. B, anterior end, left lateral view, palps missing. C, chaetigers 2 and 3, left lateral view. D, neuropodia of chaetigers 3–5, left lateral view, showing frayed, flattened, distally pointed spines and capillary chaetae protruding from prominent neuropodial lobe of chaetiger 5. E, three groups of capillaries in notopodium of chaetiger 4, left lateral view. F, left neuropodium of chaetiger 18, dorsal view, showing anterior group of capillary chaetae and protruded aristate spines alternating with mostly embedded syringe-like spines. Abbreviations: an—anterior row of chaetae; ar—aristate spines; ca—caruncle; cap—capillary chaetae; fr—frayed spines; lo5—neuropodial lobe of chaetiger 5; me—neuropodial membrane; ne1–5— neuropodial postchaetal lamellae of chaetigers 1–5; no1–5—notopodial postchaetal lamellae of chaetigers 1–5; nu—nuchal organ; po—posterior row of chaetae; pr—prostomium; su—superior tuft of chaetae; s1, s2—borders of chaetigers 1 and 2; sy—syringe-like spines. Scale bars: A–C—100 µm. D, F—50 µm. E—20 µm.