Opened penis and larger caecum of Gudeodiscus (Gudeodiscus) longiplica sp. n. (A) and Gudeodiscus (Gudeodiscus) soosi Páll-Gergely, 2013 (B). Abbreviations: C: penial caecum; C1: larger penial caecum; C2: smaller penial caecum; Cp: papilla on the inner wall of the larger penial caecum; E: epiphallus; P: penis; Pp: pockets on the penis wall; Rm: retractor muscle. Note that the most proximal portion of the penis is not shown on the left figure.

  Part of: Páll-Gergely B, Asami T (2016) A new species of Gudeodiscus Páll-Gergely, 2013 from China, with extraordinary conchological and anatomical features (Gastropoda, Pulmonata, Plectopylidae). ZooKeys 564: 1-19.