Figure 41 from: Goulding TC, Khalil M, Tan SH, Dayrat B (2018) Integrative taxonomy of a new and highly-diverse genus of onchidiid slugs from the Coral Triangle (Gastropoda, Pulmonata, Onchidiidae). ZooKeys 763: 1-111. https://doi.org/10.3897/zookeys.763.21252

Figure 41 Reproductive system, anterior, male copulatory parts, Wallaconchis ater. A Vestibule removed, showing the coiled and U-shaped penis, Indonesia, Sulawesi, scale bar 3 mm [2220] (UMIZ 00050) B Vestibule with coiled penis inside, Philippines, Bohol, scale bar 3 mm [3270] (PNM 041220). Abbreviations: dd deferent duct dpp distal penial projections p penis ps penial sheath rm retractor muscle v vestibule.