A dorsal gutter extends along the middorsal wall of the buccal capsule, emptying the dorsal esophageal gland into it. Lips are reduced or absent. The esophagus is stout, with a swollen posterior end, giving it a club shape. It is mainly muscular, corresponding to its action as a powerful pump. The esophageal glands are extremely large and are mainly outside of the esophagus, extending posteriad into the body cavity.
Cervical papillae are present near the rear level of the nerve ring.
Males have a conspicuous copulatory bursa, consisting of two broad lateral lobes and a smaller dorsal lobe, all supported by fleshy rays. The spicules are simple, needlelike, and similar. A gubernaculum is present. Females have a simple, conical tail. The vulva is postequatorial, and two ovaries are present.