calyptostase
From ZooTerms (Dictionary of Invertebrate Zoology)
calyptostase (noun; Greek kalyptos, covered; stasis, standing): (Arthropoda: Chelicerata) A stase in which acarine instars are subject to regressive characters from losing the use of appendages and mouthparts, to remaining enclosed in the tegument of the preceding stase or in the egg-shell
See also: nymphochrysalis.
