Convolutidae with simple or schort pharynx simplex invagination. Color conferred by pigments. Seminal bursa kidney-shaped or with many small spaces, up to 50 nozzles. Two genital openings. Paired ovaries and testes, paired ovaries differentiated germ and vitellaria-part. Penis either invaginated into penis-sack or seminal vesicle. With or without eyes, Body with lappets and filaments at posterior rim.[From Dorjes J (1968): 85]
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