Cyclamen mite
Affected plants have an unnaturally dense appearance because the petioles remain short. Severely attacked leaves become brittle, turn brown or silvery and [...] has the following stages: egg, larva, and adult. However, pharate females remain in their larval skin until they emerge. This stage is often considered a [...] a transitional stage between larva and adult mite during which the mite remains immobile on the leaf surface and does not feed.