| Page last updatedWed 1 October 2025
 | The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win! 
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 Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Psoronaias species Psoronaias guatemalensis (Simpson, 1900): specimens4 available nominal species synonyms
 Recent Taxonomic OpinionsPsorula guatemalensis — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Freeman et al. (2025)Psoronaias kuxensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Cummings et al. (2025)
 Nephronaias hermanni — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
 Psoronaias guatemalensis — Graf & Cummings (2021), Czaja et al. (2023)
 RangeUsumacinta basin, Guatemala. Map of Georeferenced Specimens
 Guatemala|  ANSP_45277
 creek at Chama, Guatemala
 |  USNM_362398
 Finca de Providencia, Guatemala
 |  USNM_362398
 Finca de Providencia, Guatemala
 |  |  UMMZ_108081
 Isalbha River, Chama, Guatemala
 |  INHS_31693
 Kux Creek, Chama, Alta Verapaz, Guatemala, 15.61667, -90.55
 |  ANSP_117094
 Kux Creek, Chama, Guatemala
 |  |  ANSP_117094
 Kux Creek, Chama, Guatemala
 |  ANSP_117094
 Kux Creek, Chama, Guatemala
 |  FMNH_68336
 Kux Creek, Chama, Guatemala
 |  |  INHS_82277
 Kux Creek, Chama, Guatemala
 |  MCZ_45465
 Kux Creek, Chama, Guatemala
 |  INHS_82263
 Kux Creek, near Chama, Guatemala
 |  |  ANSP_76233
 Rio Negro, Chama, Guatemala
 |  UMMZ_123347
 small stream near Hacienda Finca, Chama, Alta Vera Paz, Guatemala
 |  USNM_128991
 Usumacinta River, Guatemala
 |  |  USNM_128991
 Usumacinta River, Guatemala
 | 
 
 Mexico|  SMF_3488
 Mexico: Arroyo Limón, Staat Tabasco
 |  SMF_3488
 Mexico: Arroyo Limón, Staat Tabasco
 |  INHS_91083
 Rio Seco, Gulf of Mexico - Grijalva - Usumacinta, 1 km SW La Cascada, Cascadas Welib Ha, Chiapas, Mexico
 |  |  UF_507901
 stream near La Cascada. Chiapas, Mexico 17.375317, -91.76800
 | 
 Georeferenced Genbank Vouchers
 MexicoUF_507901 (2015-0732). (16S: MK001777, 28S: MK001811, COI: MK001760, go to Genbank) Mexico, Chiapas, stream near La Cascada (17.375317, -91.7968). UF_507901 (2015-0736). (16S: MK001778, 28S: MK001812, COI: MK001761, go to Genbank) Mexico, Chiapas, stream near La Cascada (17.375317, -91.7968) . |