Annotated checklist of the terrestrial molluscs from Laos (Mollusca, Gastropoda) Author Inkhavilay, Khamla Author Sutcharit, Chirasak Author Bantaowong, Ueangfa Author Chanabun, Ratmanee Author Siriwut, Warut Author Srisonchai, Ruttapon Author Pholyotha, Arthit Author Jirapatrasilp, Parin Author Panha, Somsak text ZooKeys 2019 834 1 166 http://dx.doi.org/10.3897/zookeys.834.28800 journal article http://dx.doi.org/10.3897/zookeys.834.28800 1313-2970-834-1 A9309D4615834D33A6B7F824BC3160FD Cryptozona siamensis (Pfeiffer, 1856) Helix siamensis Pfeiffer, 1856a: 32. Type locality: Siam [Thailand]. Pfeiffer 1856b : 76, 77, pl. 21, figs 7-9. Nanina (Hemiplecta) siamensis : Kobelt 1905: 1136, pl. 285, figs 10, 11. Hemiplecta (Hemiplecta) siamensis : Solem 1966 : 27. Cryptozona siamensis : Hemmen and Hemmen 2001 : 43. Material examined. Specimens from Tad Pha Soam waterfall, Paksong District, Champasak Province (Figs 35A, 56B). Distribution. Cambodia, Laos and Thailand ( Solem 1966 ).