FIGURE 4 in First record of Trochochaeta japonica (Annelida: Spionidae) in Brazil with identification key to species of the genus

FIGURE 4. Adult morphology of T. Japonica from estuary of Santos, São Paulo (MNRJ P1463). A, neurochaetae of chaetiger 18: aristate spines (ar) with curved and flattened distal end having hirsute conveX side and bearing long pointed terminal process (broken in middle spine), and syringe-like spines (sy) mostly embedded into neuropodial lobe and only long pointed distal end protruding outside. B, paired papillae (pa) on ventral side of anterior abdominal chaetigers. Scale bars: A—10 µm. B—100 µm.