Shells of Isannaia gen. nov., showing the inner side of the right valve, the outer side of the left valve, and the dorsal view of both valves. A. Holotype (MUMNH-UNI1950) and B. Paratype (MUMNH-UNI1952) of Isannaia fortunata sp. nov.; C. Holotype (MUMNH-UNI2895) and D. Paratype (MUMNH-UNI2897) of Isannaia occultata sp. nov. Scale bars: 10 mm.

 
 
  Part of: Jeratthitikul E, Sutcharit C, Prasankok P (2024) Two new genera and three new species of exceptionally rare and endemic freshwater mussels (Bivalvia, Unionidae) from the Mekong Basin. Zoosystematics and Evolution 100(4): 1333-1345. https://doi.org/10.3897/zse.100.130929