Hauffen’s specimens of Carychium reticulatum Hauffen, 1856 from the type locality, Bidou sturm in Slovenia. Inventory number BOKU F3434 A–G 3D visualizations of Micro-CT data of specimen BOKU F3434b showing the columellar apparatus; apertural view (A, E), dorsal view (B, F), apical view (C), umbilical view (D), lateral view (G) H–J scanning Electron Microscopy images of shell F 3434j (apical view) I detail of H showing protoconch J reticulated sculpture of Zospeum reticulatum Hauffen, 1856 K broken shell of specimen BOKU F3434d in dorsal view exhibiting collumellar apparatus L collection label of BOKU F3434. Scale bars: 1 mm (A, B, C, D, E, F, G); 100 µm (H, I, J); 1 cm (L).