Fig. 1
From: Postembryonic development and lifestyle shift in the commensal ribbon worm
General morphology in the adult and juvenile stages of Malacobdella japonica. A A schematic image of free-living monostiliferan (left) and Malacobdella (right). B M. japonica inhabiting the mantle cavity of Pseudocardium sachalinense. C Juveniles and reproductive adults of M. japonica. D Muscles of the posterior sucker, juvenile. E The anterior nervous system of the juvenile. F The posterior nervous system of the juvenile. G A nervous ring of the posterior sucker, juvenile. Scale bars: 1 cm (C); 20 μm (D); 50 μm (E, F); 30 μm. Abbreviations: ans, anus; ln, lateral nerve cord; sn, sucker nerve