Free-living, totally ciliated, bearing rhabdites over whole body; relatively large, 1.5-5 mm long; often green-colored from zoochlorellae in parenchyma; front end with no eyes; pharynx medium-size or small, edge with papillae, ciliated areas and palps; about 26 I/m; testes lateral to body; seminal vesicle in bulb, directly attached to cuticular apparatus of copulatory organ, consisting of sharp, cross-bands and end branches with alternating spines; seminal receptacle a spherical, stalked vesicle, that opens into a "transverse duct"; with bursa copulatrix [but not strongly developed?...]
Notes from synonyms
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