Shell of Opisthoporus jousseaumei A original figure (after Morgan 1885: pl. 8, fig. 2) B specimen CUMZ 4752 from Ipoh, Perak, Malaysia C specimen CUMZ 7457 from Kinta, Perak, Malaysia D lectotype of “Rhiostoma macalpinewoodsi Laidlaw, 1939” NHMUK 1939.4.13.23 from Sungei Siput, Perak E, F specimens CUMZ 10213 from Gunung Dato, Ipoh, Perak, Malaysia.

 
 
  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