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Data last updated
Mon 1 Dec 2025
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Bivalvia
| Unionoida
| Unionoidea
| Unionidae
| Ambleminae
| Quadrulini
| Megalonaias
species Megalonaias nickliniana (Lea, 1834): specimens3 available nominal species synonyms (6 total synonyms)
Recent Taxonomic Opinions
Megalonaias nickliniana — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)
Megalonaias nicklineana [sic] — ITIS (2012)
Megalonaias nervosa — Pfeiffer et al. (2018)
Range
Pánuco, Papaloapán, and the Usumacinta basins, Mexico to Guatemala.
Map of Georeferenced Specimens
MUSSELp Specimen Records
Guatemala
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BMNH_93-2-4-2035
flumen Usumacinta, Peten, Guatemala
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BMNH_93-2-4-2035
flumen Usumacinta, Peten, Guatemala
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AMNH_140574
Rio de la Pasion, Peten, Guatemala
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OSUM_18867
Rio de la Pasion, Peten, Guatemala
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OSUM_18871
Rio de la Pasion, Peten, Guatemala
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MCZ_249377
Rio de la Pasion, Santa Amelia, Peten, Guatemala
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MCZ_249377
Rio de la Pasion, Santa Amelia, Peten, Guatemala
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SMF_15039
Rio de las Salinas, Guatemala
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ZMB_39464
Rio de las Salinas, Guatemala
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ZMB_39464
Rio de las Salinas, Guatemala
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SMF_15040
Rio Usumacinta, Guatemala
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SMF_15040
Rio Usumacinta, Guatemala
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AMNH_140573
Santa Amelia, Peten, Guatemala
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MCZ_293587
Usumacinta River, Yaxchilan, 106 mi downstream from Sayache, Mexico
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Honduras
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MCZ_30507
A check of the on-line catalogue (20 December 2019) show no data for this specimen. The locality “Honduras” comes from the label. Dubious record.
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Mexico
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USNM_83898
Canton China? [Central America]
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AMNH_30721
Mexico
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AMNH_30750
Mexico
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AMNH_31226
Mexico
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AMNH_31227
Mexico
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MCZ_52398
Mexico
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MCZ_52398
Mexico
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OSUM_58285
Mexico
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OSUM_58285
Mexico
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OSUM_58285
Mexico
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USNM_83898B
Moctezuma River
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AMS_102109
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288413
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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MCZ_288413
small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
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MNHN_MP_1299
Tampico
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MNHN_MP_1299
Tampico
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MCZ_5135
Tampico, Mexico
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COMA_B.0717. Río Pánuco, Veracruz, México
Nicaragua
unknown
Genbank Vouchers
There are no georeferenced Genbank vouchers for this species in the MUSSELpdb.
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