Chamaedrilus varisetosus sp. n. A Anterior part of body (immature specimen) in lateral view, indicating chaetal distribution and the size, shape and number of pharyngeal glands B Male genitalia of a mature worm with male pores in segment VIII C Spermatheca D Brain, dorsal view E Nephridium at septum 10/11, lateral view. Abbreviations: eg = ectal gland; pb = penial bulb; sa = spermathecal ampulla; sd = spermathecal duct; sf = sperm funnel; vd = vas deferens. Scale bars: 200 µm (A); 50 µm (B-E).