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(a) Cocoon of Sagra femorata seen from the outside. (b) Inner surface of the cocoon. (c) Wall of the cocoon, revealing its two-layered nature. Under an outer layer, to which substrate particles adhere (left, partly delaminating), there is an irregular, but smooth (shining) inner layer made up of amber-colored material (right). Scale bars: (a), (b) 1 cm, (c) 4 mm.
