A–C Coptocheilus sectilabris: A lectotype MCZ 169361 from Tavoy B specimen SMF 109813 from Tavoy, and C specimen CUMZ OLM-0111 from Kaeng Krachan, Phetchaburi D–F Coptocheilus sumatranus: D syntype of Coptocheilus perakensis NHMUK 1903.11.20.33 from Perak E specimen SMF 262529/1 “Schistoloma siamensis Brandt” from Thailand: an den Tanto-Fällen bei Ban Nong Star; Yala Provinz, and F specimen NHMUK 1986.4.19.14 “Coptocheilus sectilabrum var.” from Larut near Perak.

 
 
  Part of: Jirapatrasilp P, Sutcharit C, Panha S (2022) Annotated checklist of the operculated land snails from Thailand (Mollusca, Gastropoda, Caenogastropoda): the family Pupinidae, with descriptions of several new species and subspecies, and notes on classification of Pupina Vignard, 1829 and Pupinella Gray, 1850 from mainland Southeast Asia. ZooKeys 1119: 1-115. https://doi.org/10.3897/zookeys.1119.85400