Comparison of the inner genitalia of Discula (Discula) and Discula (Mandahlia) species. 228–230Discula (Mandahlia) tectiformis from summit slopes of Pico do Baixo: 228 cross sections of the penial complex 229 inner walls of penis, atrium and distal vagina 230 inner walls of epiphallus 231–232Discula (Discula) polymorpha polymorpha from Porto Moniz, Madeira: 231 inner walls of epiphallus, penis, and atrium 232 cross section of penial papilla.

 
 
  Part of: 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