Females: No cyst stage. Body saccate, sausage-shaped, or
Cuticle thick, annulated over total body length; D-layer absent;
multiple B-layer present; subcrystalline layer present [For information on
ultrastructure of the cuticle and definition of its layers, see Shepherd, Clark
& Dart (1972) and Baldwin
Vulva submedian, large, with protruberant vulva lips.
Remnant of tail very short to absent.
Eggs not retained in body, but deposited individually, without