Trichospirura spp. females. A, T. aethiopica n. sp. Anterior region of a worm half dissected from a tube with an external muscular layer, note the anterior bend. B, part of buccal capsule and beginning of muscular oesophagus. C, detail of nerve ring, excretory pore and deirids, ventral view. D, at level of deirids, ventral view. E, T. leptostoma, posterior extremity, ovijector with a dilated chamber and uteri. F–I, T. aethiopica n. sp. F, detail of the cuticular sheath and lateral chord. G, H, posterior part, ovijector and uteri, right lateral and ventral view, respectively. I, tail, left lateral view (cuticular sheath and striae drawn at level of anus). J, caudal extremity, ventral view. Scales in μm: A, E, 500; B, C, F, I, J, 50; D, 30; G, H, 200.