Shell of Rhiostoma jalorensis A–C specimens CUMZ 4843 from Wat Tham Suwannakhuha, Phang Nga shows variation of the shell size and length of detached whorl D–F specimens CUMZ 4483 from Tao Thong Waterfall, Phang Nga shows variation in length of the breathing devices.

 
 
  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