Fig. 3

Protodrilus corderoi n. sp. Scanning electron micrographs. a Anterior end of a male, showing the arrangement of the lateral organs. Arrow head pointing at the septa. b Head, lateral view, arrow head pointing at the septa. c Palp, lateral view. d Head, ventral view. e Palps, ventral view. f Midbody segments, ventral view. g Pygidium, ventral view. h Lateral organs on segments 11–12. i Midbody segments, lateral view. j Nuchal organ. k Segmental adhesive gland on a midbody segment. go gonopores, gp glandular pores, lc long cilia, lo lateral organ, mo mouth, mc multiciliated cells, no nuchal organ, pa palp, pc peristomial ciliation, pe peristomium, pr prostomium, pyl pygidial lobes, ag adhesive glands, vc ventral ciliation