Figures 33-37 from: De Mattia W, Neiber MT, Groh K (2018) Revision of the genus-group Hystricella R. T. Lowe, 1855 from Porto Santo (Madeira Archipelago), with descriptions of new recent and fossil taxa (Gastropoda, Helicoidea, Geomitridae). ZooKeys 732: 1-125. https://doi.org/10.3897/zookeys.732.21677

Figures 33-37 Shells of Hystricella bicarinata. 33 neotype of Hystricella bicarinata, Pico do Castelo, S slope around the Miradouro, SMF 348936 34 syntype of H. duplicata R. T. Lowe 1831, NHM 1948.7.8.34; Shells of Hystricella bicarinata 35 Capela da Graça 36 Pico do Castelo, S slope around the Miradouro 37 Pico da Gandaia. Scale bar 1 mm.