Hauffen’s specimens of Carychium” reticulatum var. bidentatum Hauffen, 1856 (syn. Z. spelaeum Rossmaessler, 1839) from Glaven verh (Slovenia) and from Douga jama cave (Slovenia) A, B light microscopic images of broken shell BOKU F3473a from Glaven verh showing apertural view (A), apical view (B) C collection label of broken shell BOKU F3473a D–K specimens of BOKU F3429 from Douga jama (Slovenia) D, E light microscopic images of specimen BOKU F3429a showing apertural view (D), dorsal view (E) F–K 3D visualizations of Micro-CT data of specimen BOKU F3429b; apertural view (F), apertural view showing columellar apparatus (G), dorsal view showing columellar apparatus (H), lateral view (I), apical view (J), umbilical view (K) L, M scanning Electron Microscopy images of shell of BOKU F3473a from Glaven verh (L apical view M detail of reticulate microstructure on teleoconch) N collection label of BOKU F3429 with notation referring to Douga jama locality. Scale bars: 1 mm (A, B, D, E, F, G, H, I, J, K); 100 µm (L, M); 1 cm (C, N).