| 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 | Lampsilini | Actinonaias species Actinonaias sapotalensis (Lea, 1841): specimens3 available nominal species synonyms
 Recent Taxonomic OpinionsActinonaias sapotalensis — Graf & Cummings (2007), Bogan (2010), Bogan (2013), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)Actinonaias computatus — Graf & Cummings (2007)
 Actinonaias computata — Bogan (2010), Bogan (2013), Graf & Cummings (2021), Czaja et al. (2023)
 RangeEndemic to the Coatzacoalcos and Papaloapán basins in Veracruz, México. Map of Georeferenced Specimens
 Mexico|  MNHN-IM-2000-1662
 Coatzacoalcos, Vera Cruz, Mexico
 |  MNHN-IM-2000-1662
 Coatzacoalcos, Vera Cruz, Mexico
 |  UF_34943
 creek, 3.4 mi NW Estacion Tropical Las Tuxtlas, Veracruz, Mexico
 |  |  AMS_102104
 creek, 8.8 mi ESE Coatzacoalcos, Veracruz, Mexico
 |  CM_61.5000
 Hueyapam River, Hacienda de Cuatotolapam, canton Acayucan, Vera Cruz, Mexico
 |  UF_270383
 Mexico
 |  |  UF_270383
 Mexico
 |  NCSM_MFM_19085
 Rio Jaltepec, Jesus Carranza, Veracruz, Mexico
 |  NCSM_MFM_19086
 Rio Jaltepec, Jesus Carranza, Veracruz, Mexico
 |  |  USNM_1282260
 Rio Machina (?) on road to Montapio behind Mex. Biol. Station near Playa Escondida
 |  FMNH_11646
 Rio Papaloapan, El Hule, Veracruz, Mexico
 |  FMNH_11578
 Rio Papaloapan, Perez, Veracruz, Mexico
 |  |  MCZ_319588
 Rio San Juan, Cuatotolapam, Vera Cruz, Mexico
 |  UMMZ_34891
 Rio San Juan, Mexico
 |  USNM_85072
 Sapotal River, near Tlacatalpan, Mexico;  60 mi S of Vera Cruz
 |  |  USNM_1282264
 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_1282265
 Veracruz, Rio Papaloapan off Rt. Mex. 175 ca. 7.8 roadmiles S of the town square of Tlacotalpan
 |  USNM_1282263
 Veracruz, Rio Papaloapan off Rt. Mex. 175 in Cosamaloapan
 |  |  USNM_1282262
 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_1282261
 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)
 | 
 COMA_B.0112. Rio Papaloapan, Veracruz, México COMA_B.0714. Rio Papaloapan, Veracruz, México |