MUSSELpdb

Taxonomy

Margaritiferidae

Species & Genus Richness of
freshwater mussels
by Taxonomy

Species & Genus Richness of
freshwater bivalves
by Family

Geography

Central America

Species Richness & Endemism of
freshwater mussels
by Geography

Data last updated
Thu 22 January 2026

Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Nephronaias

species Nephronaias dysonii (Lea, 1859): specimens

2 available nominal species synonyms

Recent Taxonomic Opinions

Nephronaias dysonii — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Cummings et al. (2025)
Nephronaias sajensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)

Range

Widespread from northern Belize, south to Guatemala and Honduras.

Map of Georeferenced Specimens

specimens map of Nephronaias dysonii

MUSSELp Specimen Records

Belize

UF_207820 Aguacate River [Moho River], 6.2 km S Blue Creek Village, Toledo District, Belize 16° 08.9’ N, 89° 00.9’ W	UF_207821 Aguacate River [Moho River], 6.2 km S Blue Creek Village, Toledo District, Belize 16° 08.9’ N, 89° 00.9’ W	INHS_36540 Aguacate River, 19 mi WNW Punta Gorda, Toledo, Belize
INHS_36541 Aguacate River, 19 mi WNW Punta Gorda, Toledo, Belize	INHS_27586 Aguacate River, rm 25, NE Aguacate, Toledo, Belize	INHS_27987 Aguacate River, rm 25, NE Aguacate, Toledo, Belize
FMNH_21860 Belize, British Honduras	UMMZ_60368 Belize, British Honduras	UF_184065 Booths River, just upstream junct. with Rio Bravo, Orange Walk Dist., Belize
FMNH_120429 British Honduras	BMNH_89-12-7-19 British Honduras	USNM_664687 British Honduras
USNM_664687 British Honduras	INHS_46386 Central Belize	UF_243984 Chan Chich Creek (Rio Bravo), nr. Gallon Jug, nr. Chan Chich Lodge, Orange Walk District, Belize
UF_517939 Chan Chich Creek> Rio Bravo> Bahia de Chetumal Near Chan Chich Lodge near Gallon Jug Orange Walk District, Belize `18oN, ~87oW	UF_207299 creek, 16.6 km WSW Rancho Dolores, Orange Walk District, Belize 17° 30.5’ N, 88° 43.7’ W	UF_207299 creek, 16.6 km WSW Rancho Dolores, Orange Walk District, Belize 17° 30.5’ N, 88° 43.7’ W
UF_207303 creek, 16.6 km WSW Rancho Dolores, Orange Walk District, Belize 17° 30.5’ N, 88° 43.7’ W	INHS_46385 creek, Pueblo Viejo, 38.3 km WNW Punta Gorda, Toledo District, Belize	MCZ_59651 Gongora River, British Honduras
MCZ_59651 Gongora River, British Honduras	UF_207626 Hickatee Creek, trib. of Rio Bravo, 5.7 km NE Big Falls Village, Toledo District, Belize 16° 17.7’ N, 88° 52.0’ W	UF_201624 Indian Creek, at S Hwy, 8.1 km NE Indian Cr. Village, Toledo District, Belize 16° 21.7’ N, 88° 48.0’ W
UF_207623 Indian Creek, at S Hwy, 8.1 km NE Indian Cr. Village, Toledo District, Belize 16° 21.7’ N, 88° 48.0’ W	UF_207624 Indian Creek, at S Hwy, 8.1 km NE Indian Cr. Village, Toledo District, Belize 16° 21.7’ N, 88° 48.0’ W	INHS_23097 Macal River, 12 mi S Augustine, Cayo, Belize
USNM_382726 Manatee River, British Honduras	USNM_382726 Manatee River, British Honduras	UF_207726 Moho River, 1.3 km W Santa Anna, Toledo District, Belize 16° 05.9’ N, 88° 56.9’ W
FMNH_21864 Punta Gorda, British Honduras	FMNH_90080 Punta Gorda, British Honduras	FMNH_21861 Punta Gorda, British Honduras
UMMZ_60443 Punta Gorda, British Honduras	UMMZ_57487 Punta Gorda, British Honduras	UMMZ_57486 Punta Gorda, British Honduras
UF_207222 Rio Bravo, Cedar Crossing, 21 km S Rio Bravo Research Station, Orange Walk Dist., Belize 17° 41.4’ N, 89° 02.0’ W	UF_207223 Rio Bravo, Cedar Crossing, 21 km S Rio Bravo Research Station, Orange Walk Dist., Belize 17° 41.4’ N, 89° 02.0’ W	UF_207283 Rio Bravo, Sylvesters Camp Orange Walk Dist., Belize 17° 35.5’ N, 89° 05.6’ W
UF_207284 Rio Bravo, Sylvesters Camp Orange Walk Dist., Belize 17° 35.5’ N, 89° 05.6’ W	UF_207284 Rio Bravo, Sylvesters Camp Orange Walk Dist., Belize 17° 35.5’ N, 89° 05.6’ W	UF_517940B Rio Bravo> Bahia de Chetumal Cedar Crossing on Gallon Jug Rd., Rio Bravo Cons. Area Orange Walk District, Belize ~18°N, ~87°W
UF_517940 Rio Bravo> Bahia de Chetumal Cedar Crossing on Gallon Jug Rd., Rio Bravo Cons. Area Orange Walk District, Belize ~18oN, ~87oW	UF_207629 Rio Grande, Big Falls, Toledo District, Belize 16° 15.3’ N, 88° 53.2’ W	UF_207913 Rio Grande, Big Falls, Toledo District, Belize 16° 15.3’ N, 88° 53.2’ W
UF_207913 Rio Grande, Big Falls, Toledo District, Belize 16° 15.3’ N, 88° 53.2’ W	USNM_150380 small stream near Punta Gorda, Belize	USNM_193019 Yaalback Cr., Cayo Distr., Honduras
BMNH_97-7-6-1-4 Yalbac River, Western District, British Honduras

Guatemala

MCZ_MP_271 Guatemala	NCSM_6244 North America, Guatemala, Rio Saja (Mullee River Dr.), 4-5 mi W of Esmeralda	UMMZ_108010 Rio Saja, 5 mi W Esmeralda, Guatemala
FMNH_68188 Rio Saja, 5 mi W Esmeralda, Guatemala	ANSP_145239 Rio Saja, 5 mi W Esmeralda, Guatemala	MCZ_21169 Rio Saja, Nicaragua
MCZ_45420 Rio Saja, trib. to Rio Dulce, W of Esmeralda, Guatemala	MCZ_MP_287 Saja River (trib. to Dulce River) 4 or 5 mi W Esmeralda, Guatemala	INHS_21773 Saja River (trib. to Dulce River) 4 or 5 mi W Esmeralda, Guatemala
ANSP_45419 Saja River, a trib of the Rio Dulce, Nicaragua	ANSP_45419 Saja River, a trib of the Rio Dulce, Nicaragua	INHS_21772 Saja River, Esmeralda, Guatemala
ZMB_MP_0508 Tehuantepec, Coban, Vera Paz, Guatemala

Honduras

UF_211977 2.6 km SW La Brea, Colon Department, Honduras 15° 45’ 39” N, 86° 00’ 08” W	ANSP_129445 Branch of Chamelecon River, Honduras	MCZ_MP_282 edge of Ulua River, Carozal, Honduras
BMNH_1965173 Honduras	BMNH_1965173 Honduras	MCZ_MP_270 Honduras
USNM_215593 La Ceiba, Honduras	UF_22127 Quebrada Grande, 8.5 km W San Juan, Atlantida Department, Honduras	UF_194521 Rio Guayape, 10 km SE Catacamas, Olancho Dept., Honduras 14° 45’ 43” N, 85°, 53’ 07” W
UF_194522 Rio Guayape, 10 km SE Catacamas, Olancho Dept., Honduras 14° 45’ 43” N, 85°, 53’ 07” W	UF_221530 Rio Guayape, 11 km SSE Catacamas, Olancho Department, Honduras	UF_194524 Rio Guayape, 9 km ENE Juticalpa, Olancho Dept., Honduras 14° 43’ 11” N, 86°, 08’ 43” W
FMNH_29002 Rio Humuya, Comayagua, Honduras	MCZ_MP_290 Rio Humuya, Comayagua, Honduras	UF_194241 Rio Sulaco, branch of Cajon Reservior, Yoro Dept., Honduras 14° 01’ 11’ N, 87° 30’ 19” W
UF_194241 Rio Sulaco, branch of Cajon Reservior, Yoro Dept., Honduras 14° 01’ 11’ N, 87° 30’ 19” W	UF_270354 Rio Ulua, Honduras	UF_221378 small creek, Icoteas, ca. 17 km E Limon on road to Iriona, Colon Department, Honduras
UF_221378 small creek, Icoteas, ca. 17 km E Limon on road to Iriona, Colon Department, Honduras	UF_221379 small creek, Icoteas, ca. 17 km E Limon on road to Iriona, Colon Department, Honduras	HMC_1861_01 unknown river> Caribbean Sea no specific site given, Honduras
HMC_1861_02 unknown river> Caribbean Sea no specific site given, Honduras

BMNH_1965174. Honduras

unknown

UMMZ_107976
[no locality available - Central America]

UMMZ_107976
[no locality available - Central America]

Genbank Vouchers

There are no georeferenced Genbank vouchers for this species in the MUSSELpdb.