L-shaped pupation tunnel of Tetropium castaneum (Cerambycidae) after emergence of the adult beetle with densely packed wood chips and fibers in the straight horizontal part of the tunnel (photo B. Wermelinger).

  Part of: Müller A, Richter H (2018) Dual function of Potentilla (Rosaceae) in the life history of the rare boreoalpine osmiine bee Hoplitis (Formicapis) robusta (Hymenoptera, Megachilidae). Alpine Entomology 2: 139-147. https://doi.org/10.3897/alpento.2.30158