Shell of Rhiostoma dalyi A syntype NHMUK 1902.1.24.14–16 from Juxta Phitsanulok B, C specimens CUMZ 4848 from Tham Erawan, Long, Prae D specimen CUMZ 3979 from Tarnsawan Waterfall, Phayao E, F specimens CUMZ 3926 from Tham Pha Tangyai, Pong, Phayao.

 
 
  Part of: Tongkerd P, Tumpeesuwan S, Inkhavilay K, Prasankok P, Jeratthitikul E, Panha S, Sutcharit C (2023) Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species. ZooKeys 1142: 1-144. https://doi.org/10.3897/zookeys.1142.90097