IntroTABLE 1: Structure of the sensilla.

¹The two amphids open to outside through little pockets on the cuticle.
²Nubbins are located at the distal regions of the cilia.
³The six IL1 and six IL2 endings share the same inner labial sensilla, but IL2 dendrites protrude to the outside whereas IL1 endings do not.
⁴In males, the four CEM neurons open to outside through cephalic sensilla (Ward et al., 1975).

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