Procamallanus spiculastriatus sp. n., scanning electron microscopy. a tail of a male worm, ventral view, three preanal pairs (arrows) and three postanal pairs (arrows), four adcloacal papillae (arrowheads) and a lateral phasmid (*) are visible b tail of a male worm, lateral view with the spicule partially extroverted, and two pairs of sessile papillae are located along lateral margin (arrowhead); inset c detail of the tip of a spicule d tail of a female worm, ventral view, anus (an). Scale bars: 25 μm (a); 50 μm (b); 5 μm (c); 50 μm (d).