21, d) - such as may be noticed in the majority of the Lepidoptera - whose appendages are closely and immovably pressed to the body by a general hardening and fusion of the cuticle.
Appendages of 2nd pair folding in a horizontal plane, completely chelate, the claw immovably united to the sixth segment.
Remaining pairs of appendages with their basal segments immovably fixed to the sternal surface, similar in form, the posterior three pairs furnished with two claws supported on long stalks; the basal segments of the 6th pair bearing five pairs of tactile sensory organs or malleoli.
Appendages of 3rd, 4th, 5th and 6th pairs similar in form; their basal segments in contact in the middle line and immovably welded, except those of the 3rd pair, which have been pushed aside so that the bases of the 2nd and 4th pairs are in contact with each other.
The prosoma and opisthosoma were broadly confluent and probably immovably welded together.
How would you define immovably? Add your definition here.