| 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! 
					Search the database pages: 
 Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Nephronaias species Nephronaias goascoranensis (Lea, 1858): specimens5 available nominal species synonyms (8 total synonyms)
 Recent Taxonomic OpinionsNephronaias goascoranensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)Nephronaias championi — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
 Nephronaias lempensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
 RangeGuatemala to Nicaragua. Map of Georeferenced Specimens
 El Salvador|  USNM_360387
 L. Guija, San Salvador
 |  UF_426965
 Lago de Guija, 8.5 km WSW Metapan, Santa Anna Department, El Salvador 14.302, -89.519
 |  USNM_426016
 Laguna de Guija, S. Salvador
 |  |  USNM_426016
 Laguna de Guija, S. Salvador
 |  USNM_426018
 Laguna de Guija, S. Salvador
 |  USNM_426018
 Laguna de Guija, S. Salvador
 |  |  USNM_361764
 Rio Lempe at R.R. Bridge, Salvador
 |  USNM_361764
 Rio Lempe at R.R. Bridge, Salvador
 |  USNM_347898
 Rio Paz, near Ahuachapan, Salvador
 |  |  USNM_347898
 Rio Paz, near Ahuachapan, Salvador
 | 
 
 Guatemala|  SMF_3486
 Paso Antonio, Rio Michatoya, W. Guatemala
 |  BMNH_1901-6-22-1538-1539
 Paso San Antonio, Guatemala
 |  ZMB_220174
 Paso San Antonio, in the Pacific Coast Region, Guatemala
 |  |  ZMB_220174
 Paso San Antonio, in the Pacific Coast Region, Guatemala
 |  FMNH_16557
 Rio Chiquimula, Departmento de Zacapa, Guatemala
 |  ZMB_108851
 Rio Michatoya, bei Paso San Antonio, Guatemala
 |  |  ZMB_108851
 Rio Michatoya, bei Paso San Antonio, Guatemala
 |  ZMB_220175
 Rio Michatoya, bei Paso San Antonio, Guatemala
 |  ZMB_220175
 Rio Michatoya, bei Paso San Antonio, Guatemala
 |  |  ZMB_MP_0509
 Rio Michatoya, Paso San Antonio, Guatemala
 |  ZMB_MP_0509
 Rio Michatoya, Paso San Antonio, Guatemala
 |  ZMB_220176
 Rio Naranjo, a confluent of the Rio Michatoya at the station of Naranjo
 | 
 
 Honduras|  UF_24781
 6 km W Comay, Comayagua Valley, Orillas de Humaya, Honduras
 |  USNM_84411
 Comayagua, Honduras
 |  USNM_84411
 Comayagua, Honduras
 |  |  USNM_85086
 Goascoran R., Honduras
 |  ANSP_129957
 Goascoran River, Honduras
 |  UF_270372
 Honduras
 |  |  UF_270384
 Honduras
 |  UMMZ_107991
 Honduras
 |  USNM_84410
 Honduras
 |  |  USNM_84410
 Honduras
 |  BMNH_1954-6-2-1453-1455
 Humuya River, Honduras
 |  UMMZ_107979
 Pactuca River, Honduras
 |  |  USNM_152965
 Patook [=Patuca] River, Capunta, Honduras
 |  UF_270385
 Patook River, Honduras
 |  UF_20621
 Rio Humuya, 7 km NW Comayagua, Valle de Comayagua, Honduras
 |  |  USNM_819898
 Rio Humuya, Comayagua, Honduras
 |  UF_221125
 Rio Ulua, 1 km SW Pimienta, Cortez, Department, Honduras
 | 
 USNM_193020.  
 Mexico|  MNHN_MP_1370
 Laguna de Dolores, Mexique
 |  UMMZ_107978
 Mexico
 |  MNHN_MP_1377
 Oaxaca, Mexico
 |  |  NCSM_5816
 Rio Perros, 4.9 km SSE Ixtepec, Oaxaca, Mexico
 |  NCSM_MFM_19203
 Rio Perros, 4.9 km SSE Ixtepec, Oaxaca, Mexico
 |  NCSM_MFM_19204
 Rio Perros, 4.9 km SSE Ixtepec, Oaxaca, Mexico
 |  |  NCSM_62217
 Rio Tehuantepec, 0.8 [air] kilometers above [NNE center] Tehuantepec
 |  UMMZ_107977
 Southern Mexico
 |  AMNH_30269
 Tehuantepec
 |  |  ZMB_MP_0510
 Tehuantepec
 |  UF_231214
 Tehuantepec River, Tehuantepec, Oaxaca, Mexico
 |  MCZ_361571
 Tehuantepec, Oaxaca, Mexico
 | 
 
 Nicaragua|  BMNH_1907-12-30-52
 Columbia River, Oregon
 |  USNM_84399
 Estero Real, G. of Fonseca, Nicaragua
 |  USNM_84399
 Estero Real, G. of Fonseca, Nicaragua
 |  |  USNM_84399
 Estero Real, G. of Fonseca, Nicaragua
 |  MCZ_21172
 Estero Real, Gulf of Fonseca, Nicaragua
 |  ANSP_125626
 Estero Real, Nicaragua
 |  |  ANSP_125626
 Estero Real, Nicaragua
 |  UF_229378
 Estero Real, Nicaragua
 |  UF_229378
 Estero Real, Nicaragua
 |  |  USNM_24021
 L. Nicaragua
 |  AMNH_121381
 Laguna de Jiloa, Managua, Managua
 |  CM_61.1467
 Lake Nicaragua
 |  |  CM_61.1468
 Lake Nicaragua
 |  CM_61.1468
 Lake Nicaragua
 |  UMMZ_107973
 Lake Nicaragua, Nicaragua
 |  |  ANSP_129958
 Malacatoya River, Central America
 |  AMS_126891
 Nicaragua
 |  ANSP_125624
 Nicaragua
 |  |  FMNH_22258
 Nicaragua
 |  UF_270375
 Nicaragua
 |  UMMZ_107956
 Nicaragua
 |  |  UMMZ_107967
 Nicaragua
 |  UMMZ_107972
 Nicaragua
 |  USNM_59872
 Nicaragua
 |  |  USNM_59887
 Nicaragua
 |  USNM_73065
 Nicaragua
 |  USNM_73065
 Nicaragua
 |  |  USNM_792455
 Nicaragua
 |  USNM_792455
 Nicaragua
 |  USNM_792456
 Nicaragua
 |  |  USNM_792456
 Nicaragua
 |  USNM_792457
 Nicaragua
 |  USNM_792457
 Nicaragua
 |  |  ZMB_MP_0520
 Nicaragua
 |  USNM_84400
 River Malacatoya, Central America
 |  MCZ_6590
 San Areniene, Nicaragua
 |  |  MCZ_21168
 small stream passing though Viego [Viejo] and San Geronimo, Nicaragua
 | 
 
 unknown |