Shell of Rhiostoma prestoni A syntype MNHN-IM-2000-30754 from Binh-Lu B syntype RBINS/MT/525354 from Binh-Lu C–F originally labelled as “Pterocyclus prestoni depictus Bavay & Dautzenberg, 1908” C syntype MNHN-IM-2000-30755 from Phong-Tho and D–F syntype RBINS/MT/525355 from Phong Tho. Photograph: M Caballer and V Heros, MNHN (A, C).

 
 
  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