Morphology
Whereas males grow to only about 0.9 mm in length, females can grow from 2.0 to 2.5 mm. Both genders also possess a tiny buccal capsule and cylindrical esophagus without a posterior bulb. In the free-living stage, the esophagi of both sexes are rhabditiform. Males can be distinguished from females by two structures: the spicules and gubernaculum.
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