| Page last updated
Thu 3 September 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 | Nephronaias species Nephronaias caldwellii (Lea, 1858): specimens 2 available nominal species synonyms Recent Taxonomic OpinionsBarynaias caldwellii — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021) Nephronaias caldwellii — Cummings et al. (2025) RangeWidely distributed in Pacific drainages from Mexico, Guatemala, and Nicaragua to Panama. Map of Georeferenced Specimens
Guatemala
Nicaragua
Panama FMNH_73370 Bayano River, above Chepo, Panama Prov., Panama
|  FMNH_110180 Bayano River, El Llano, Panama Prov., Panama
|  USNM_536560 Bayano River, near Acanti, Panama
|  USNM_536560 Bayano River, near Acanti, Panama
|  ANSP_161833 Bayano River, Pintupo, Darien, Rep. Panama
|  FMNH_63537 Bayano River, Pintupo, Darrien, Panama
|  UMMZ_107957 Chimaugua River, Isthmus of Darien, Panama
|  MCZ_293266 Chucunaque River, Isthmus of Darien, Panama
|  USNM_84385 Chumnagua R., Isth. of Darien
|  USNM_84385 Chumnagua R., Isth. of Darien
|  AMNH_179584 Darien, Canal Zone, Panama
|  USNM_513600 Isla de Coiba, Panama
|  USNM_84396 Isthmus of Darien
|  USNM_84396 Isthmus of Darien
|  NCSM_6243 North America, Golfo de San miguel asin/ Rio Chucunaque/ Rio Membrillo Panama, Darién, Rio Membrillo (Rio Chucunaque-Rio Turia drainage), ca 5km, upstream Siani
|  USNM_424421 Republic of Panama
|  ANSP_243690 Rio Banayo at El Llano, 15 mi fr. Chepo, Republic of Panama
|  ANSP_162482 Rio Bayano just below El Llano, Panama
|  USNM_361760 Rio Chucunaque, above Rio Chiati, Panama
|  USNM_361760 Rio Chucunaque, above Rio Chiati, Panama
|  INHS_21691 Rio Membrillo, ca. 5 km upstream Sinai, Darien, Panama
|  AMS_140904 Rio Turia, Boca de Cupe, Darien Prov., Panama
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unknown |