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Data last updated
Mon 1 Dec 2025
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Bivalvia
| Unionoida
| Unionoidea
| Unionidae
| Ambleminae
| Lampsilini
| Mesonaias
species Mesonaias explicata (Morelet, 1849): specimens5 available nominal species synonyms (12 total synonyms)
Recent Taxonomic Opinions
Cyrtonaias explicata — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Graf & Cummings (2021), Czaja et al. (2023), Freeman et al. (2025)
Cyrtonaias livida — Graf & Cummings (2007), Bogan (2010), Czaja et al. (2023)
Cyrtonaias sapperi — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Potamilus rovirosai — Graf & Cummings (2007), Bogan (2010), Czaja et al. (2023)
Sphenonaias microdon — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Graf & Cummings (2021), Czaja et al. (2023), Freeman et al. (2025)
Cyrtonaias umbrosa — Graf & Cummings (2021)
Mesonaias explicata — Cummings et al. (2025)
Range
Usumacinta River, Mexico and Guatemala.
Map of Georeferenced Specimens
MUSSELp Specimen Records
Guatemala
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SMF_3477
Río Chixoy, Nebemfld. Río Usumacinta, Guatemala
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SMF_3477
Río Chixoy, Nebemfld. Río Usumacinta, Guatemala
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SMF_3478
Rio Chixoy, Nebenfl. d. Rio Usumacinta, Guatemala
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USNM_128995
Rio Chixoy, Rompido, Peten, Guatemala
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USNM_128995
Rio Chixoy, Rompido, Peten, Guatemala
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UF_507903
Rio De La Pasion, 5.5 miles east of Sayaxche, El Peten Department, Guatemala 16.536339, -90.103900
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USNM_783045
Rio de la Pasion, Guatemala
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USNM_783045
Rio de la Pasion, Guatemala
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OSUM_18872
Rio de la Pasion, Peten, Guatemala
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AMNH_140572
Rio de la Pasion, Treasure Island, Peten, Guatemala
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ZMB_39465
Rio de las Salinas, Guatemala
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ZMB_39465
Rio de las Salinas, Guatemala
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BMNH_20190695
Rio Usumacinta, Guatemala
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BMNH_20190695
Rio Usumacinta, Guatemala
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BMNH_20190695
Rio Usumacinta, Guatemala
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MNHN_MP_1297
Rio Usumacinta, Guatemala
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MNHN_MP_1297
Rio Usumacinta, Guatemala
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MNHN-IM-2000-1693
Rio Usumacinta, Guatemala
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MNHN-IM-2000-1693
Rio Usumacinta, Guatemala
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Mexico
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MCZ_288415
3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288415
3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288415
3 mi SE Emiliano Zapata, Tabasco, Mexico
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BMNH_93-2-4-2027
flumen Usumasinta, ad pagum Balancan Tabascensium [Mexico].
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BMNH_93-2-4-2027
flumen Usumasinta, ad pagum Balancan Tabascensium [Mexico].
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SMF_12407
La Bola, Rio Lacantun, Nebenfl. d Rio Grijalva, Chiapas, Mexico
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SMF_12407
La Bola, Rio Lacantun, Nebenfl. d Rio Grijalva, Chiapas, Mexico
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ANSP_58916
Laguna de Atasta, nr. S.J. Bautista, Tabasco, Mex.
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SMF_12410
Mexico
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SMF_12415
Rio de la Concordia, Nebenfl. d Rio Grijalva, Chiapas, Mexico
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SMF_12408
Rio Grijalva, Chiapas, Mexico
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UF_164047
Rio San Pedro, 3 km N La Palma, Tabasco, Mexico.
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UF_164060
Rio San Pedro, 3 km N La Palma, Tabasco, Mexico.
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UF_164530
Rio San Pedro, 4 km N La Palma, Tabasco, Mexico
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AMS_102110
Rio Usumacinta, 5.5 mi SE Emillano Zapata, Tabasco, Mexico
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INHS_24861
Rio Usumacinta, Boca Lacantum, Chiapas, Mexico
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UF_190666
Rio Usumacinta, Emiliano Zapata, Tabasco, Mexico
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UF_190667
Rio Usumacinta, Emiliano Zapata, Tabasco, Mexico
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USNM_160741
Rio Usumacinta, Monte Cristo, Tabasco, Mexico
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USNM_160741
Rio Usumacinta, Monte Cristo, Tabasco, Mexico
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AMS_102123
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288418
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288418
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288418
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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UF_507898
Usumacinta River, opposite of Emiliano Zapata. Tabasco, Mexico. 17.749685, -91.766995
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ZMA_418019. Mexico
Genbank Vouchers
Georeferenced Genbank Vouchers
Mexico
UF_507898 (2015-0719). (16S: MK001801, 28S: MK001835, COI: MK001769, go to Genbank) Mexico, Tabasco, Usumacinta River, opposite Emiliano Zapata (17.749685, -91.766995) .
UF_507898 (2015-0720). (16S: MK001802, 28S: MK001836, COI: MK001770, go to Genbank) ditto.
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