Free-living, totally ciliated, anterior end without ear-like broadenings; pharynx of different sizes, its edge bearing 8-10 papillae, with or without palps; 26 inner longitudinal muscles of pharynx; testes wholely or partially in caudal body half; seminal vesicle in bulb, directly attached to cuticular apparatus of copulatory organ, consisting of girdle and spines (Giesztoria-type); seminal receptacle in oviduct or as special vesicle; uterus with sphincter; eggs unstalked, once in uterus; cement glands present;[From Luther A (1955): 170]
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