Penis and penial hooks, Peronia verruculata (unit #2), Indonesia, Sumatra A, B [1746] (UMIZ 00178) C, E [1795] (UMIZ 00180) D, F [1797] (UMIZ 00180). Scale bars: 60 μm (A), 6 μm (B, E, F), 20 μm (C, D).

 
 
  Part of: Dayrat B, Goulding TC, Apte D, Aslam S, Bourke A, Comendador J, Khalil M, Ngô XQ, Tan SK, Tan SH (2020) Systematic revision of the genus Peronia Fleming, 1822 (Gastropoda, Euthyneura, Pulmonata, Onchidiidae). ZooKeys 972: 1-224. https://doi.org/10.3897/zookeys.972.52853