| 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 distincta (Crosse & Fischer, 1893): specimens1 available nominal species synonym
 Recent Taxonomic OpinionsPsoronaias distincta — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025) RangeVera Cruz, Mexico. Map of Georeferenced Specimens
 Mexico|  ANSP_125584
 Alvarado River [=Rio Papaloapan], Mexico
 |  ANSP_125584
 Alvarado River [=Rio Papaloapan], Mexico
 |  OSUM_58287
 Mexico
 |  |  MNHN_MP_1346
 Mexique
 |  USNM_84336
 near Vera Cruz, Mexico
 |  USNM_84336
 near Vera Cruz, Mexico
 |  |  MCZ_288435
 Rio Chacalapa, 2.7 mi NW Chinameca, Veracruz, Mexcio
 |  AMS_102120
 Rio Chacalapa, 2.7 mi NW Chinameca, Veracruz, Mexico
 |  MNHN-IM-2000-1676
 Rio Cosamaloapan, Mexique
 |  |  MNHN-IM-2000-1676
 Rio Cosamaloapan, Mexique
 |  BMNH_MP_424
 Rio Nopalapa, Mexico
 |  BMNH_MP_424
 Rio Nopalapa, Mexico
 |  |  FMNH_11644
 Rio Papaloapan, El Hule, Veracruz, Mexico
 |  MCZ_52586
 Rio San Juan, Mexico
 |  ANSP_133686
 Rio San Juan, Vera Cruz, Mexico
 |  |  ANSP_142601
 Tamapa [Jamapa] River, V.C. Mexico
 |  ANSP_129924
 Tecomate River, Mexico
 |  ANSP_129924
 Tecomate River, Mexico
 |  |  ANSP_68489
 Tecomate River, Mexico
 |  ANSP_68489
 Tecomate River, Mexico
 |  UF_270506
 Veracruz, Mexico
 |  |  USNM_1282614-15
 Veracruz, Rio Papaloapan off road from Ciudad Aleman to Tuxtepec; ca. 0.5 roadmiles by dirt road to river; dirt road entrance to Aleman-Tuxtepec road is ca. 2.4 roadmiles W of divergence of roads to Ciudad Aleman and Cosamaloapan
 |  USNM_1282617
 Veracruz, Rio Papaloapan off Rt. Mex. 175 ca. 7.8 roadmiles S of the town square of Tlacotalpan
 |  USNM_1282613
 Veracruz, Rio Papaloapan off Rt. Mex. 175 in Cosamaloapan
 |  |  USNM_1282618
 Veracruz, Rio Pozuelo (as locally called) ca. 0.2 miles N of bridge in Tlalixcoyan
 |  USNM_1282611-12
 Veracruz, Rio San Juan at Rt. Mex. 25 ca. 20.5 roadmiles S of Santiago Tuxtla (junction of Rt. Mex. 25 and Rt. Mex. 180), and ca. 16.2 roadmiles from junction of Rt. Mex. 25 and Rt. Mex. 145
 |  USNM_1282619
 Veracruz, Rio San Juan at Rt. Mex. 25 ca. 20.5 roadmiles S of Santiago Tuxtla (junction of Rt. Mex. 25 and Rt. Mex. 180), and ca. 16.2 roadmiles from junction of Rt. Mex. 25 and Rt. Mex. 145
 |  |  USNM_1282610
 Veracruz, Rio Tesechoacan at Tesechoacan, ca. 0.5 miles N of bridge of Rt. Mex. 145 (ca. 9.3 roadmiles W of junction of Rt. Mex. 145 and Rt. Mex. 25)
 |  USNM_1282616
 Veracruz, spillway pool off left side of Rio Papaloapan along Rt. Mex. 175 in Cosamaloapan
 | 
 COMA_B.0839. Laguna de San Marcos, San Cristóbal, Veracruz, México COMA_B.0840. Laguna María Lizamba, Veracruz, México COMA_B.0191. Río Jamapa, Veracruz, México |