Outer distal genitalia of Portosanctan and Madeiran Geomitridae. 20 Hystricella bicarinata, Capela da Graça 21 Discula polymorpha alleniana, Porto Moniz, Madeira 22Discula (Mandahlia) tectiformis, Pico do Baixo 23 Callina rotula, Cabeco dos Bades 24 Serratorotula juliformis, Pico de Ana Ferreira 25 Lemniscia michaudi, Terra Chã 26Actinella (Plebecula) littorinella E of Pico do Castelo 27Caseolus (C.) innominatus portosanctanus, Ribeira da Areia 28Caseolus (Helicomela) punctulatus punctulatus, Fonte da Areia 29Caseolus (Leptostictea) leptosticus, Ponta do Garajau, Madeira 30 Spirorbula depauperata, Pico de Ana Ferreira. Scale bars 1 mm.

 
 
  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