Photos of sites where subterranean gastropods were found. A Khammouane: main entrance of Tham Khon Dôn Cave with source of Nam Dôn River (2 in Fig. 1) B Earthquake Dome in cave Tham Khon Dôn (1 in Fig. 1) C Mount Pha Kouankaohong with entrance of Tham Khon Dôn cave at its foot D Bolikhamsay, travertine cascades below the LT of Tricula viengthongensis sp. n. (6 in Fig. 1) E Khammouane, one of the main entrances of Tham Pha Soung Cave F Tham Pha Soung Cave, sampling at Frog Lake (4 in Fig. 1). (Photos: Ondrej Kameniar, Mário Olšavský and Jozef Grego).

 
 
  Part of: Grego J (2018) First record of subterranean rissoidean gastropod assemblages in Southeast Asia (Mollusca, Gastropoda, Pomatiopsidae). Subterranean Biology 25: 9-34. https://doi.org/10.3897/subtbiol.25.23463