Lateral fields 1/3 body width, marked by 4 incisures. Lip region with 4 annules, continuous with head contour. Cephalic framework massive. Spear 20u-23u long with strong knobs. Dorsal esophageal gland outlet 5u-8u behind spear. Bursa enveloping 2/3-3/4 of tail. Terminus pointed or with mucro.