Fig. 1

Body wall musculature and innervation in Eudiplozoon nipponicum. A. General view of an adult, with the hindbody bearing typical lobular extensions (arrowheads). The white circle indicates the area of the mouth and the white rectangle the area of the haptor. SEM. B. Detail of the forebody tegument surface, showing the tegumentary annular ridges and folds. SEM. C. Organisation of body wall musculature within the annular transverse ridges and folds. CLSM, phalloidin-TRITC. D. Detailed view of the body wall musculature, showing the circular, longitudinal and diagonal muscle fibres. CLSM, phalloidin-TRITC/Hoechst. E. Perpendicular muscle fibres. CLSM, phalloidin-TRITC. F. Peripheral nervous system subjacent to the tegument. CLSM, anti-α-tubulin-FITC. G. High magnification of the tegument innervation. CLSM, anti-α-tubulin-FITC. H. Nerve nodes located deeper within the tegument. TEM. cm – circular muscle fibres, dm – diagonal muscle fibres, f – folds, fb1– forebody 1, fb2 – forebody, hb1 – hindbody 1, hb2 – hindbody 2, lm – longitudinal muscle fibres, nf – peripheral nerve fibres subjacent to the circular musculature, sc – syncytium, tr – annular transverse ridges