Trigonostominae with the pharynx situated in the first body half. Paired testes in front of the pharynx. Paired ovovitellaria with the ovaries and atrial organs situated just caudally to the pharynx. Prostate stylet a curved tube, distally surrounded by the mantle. Additional vesicle (with sperm) at the proximal part of the female (efferent) duct. Afferent system consisting of curling duct and large, thin-walled bursa (with sclerotized bursal stalk). Mouthpiece of bursa consisting of a club-shaped part surrounded by a barrel-shaped part.[From Willems WR, Artois TJ, Vermin W, Backeljau T, Schockaert ER (2005): 1569]
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