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(a): Larva of Oligostomis reticulata (Linnaeus, 1761) (Plenitentoria: Phryganeidae) in its case composed of pieces of angiosperm leaves; © W. Graf. (b): Larva of Drusus sp. (Plenitentoria: Limnephilidae) in its case composed of gravel; © S. Vitecek.
