MUSSELpdb
Taxonomy
Species & Genus Richness of
freshwater mussels
by Taxonomy
Species & Genus Richness of
freshwater bivalves
by Family
Geography
Species Richness & Endemism of
freshwater mussels
by Geography
Data last updated
Mon 2 March 2026
Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Psoronaias
species Psoronaias crocodilorum (Morelet, 1849): specimens
17 available nominal species synonyms (25 total synonyms)
Recent Taxonomic Opinions
Psoronaias crocodilorum — Graf & Cummings (2007), Bogan (2010), Cummings et al. (2025)
Psoronaias ostreata — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023)
Psoronaias morini — Graf & Cummings (2007), Bogan (2010)
Psoronaias semigranosa — Graf & Cummings (2007), Pfeiffer et al. (2019), Pfeiffer et al. (2019), Inoue et al. (2020), Smith et al. (2020), Graf & Cummings (2021), Freeman et al. (2025)
Psorula percompressa — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020)
Psorula usumasintae — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Freeman et al. (2025)
Barynaias pigerrima — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Psorula rudis — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Freeman et al. (2025)
Psorula profunda — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Freeman et al. (2025)
Psorula quadrata — Graf & Cummings (2007), Bogan (2010)
Psoronaias martensi — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Psorula salinarum — Graf & Cummings (2007), Bogan (2010)
Psoronaias testudinarea [sic] — Bogan (2010)
Psoronaias psorica — Bogan (2010)
Psoronaias percompressa — Graf & Cummings (2021), Czaja et al. (2023), Campbell & Lydeard (2026)
Psoronaias usumasintae — Graf & Cummings (2021), Czaja et al. (2023), Campbell & Lydeard (2026)
Psoronaias profunda — Graf & Cummings (2021), Czaja et al. (2023), Campbell & Lydeard (2026)
Psoronaias quadrata — Graf & Cummings (2021)
Psoronaias salinarum — Graf & Cummings (2021)
Barynaias pigerrimus — Czaja et al. (2023)
Psorula percompressus — Freeman et al. (2025)
Range
Endemic to the Usumacinta basin, México and Guatemala (Central America: CA1)
Map of Georeferenced Specimens
MUSSELp Specimen Records
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Guatemala
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COMA_2048. Rio Usumacinta, Tabasco, Mexico
BMNH_1893-2-4-2032. River Usumacinta, Guatemala
Mexico
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COMA_B.1053. Río Candelaria, Campeche, México
COMA_B.0392. Rio González, Laguna del Horizonte, Tabasco, México
UF_529129. Rio San Pedro, Bahia Campeche 3 km N of La Palma Tabasco, Mexico
BMNH_93-2-4-2034. Rio Usumacinta, Tabasco
COMA_B.0720. Río Usumacinta, Tabasco, México
MCZ_288418B. small river, 3 mi SE Emiliano Zapata, Tabasco, Mexico
unknown
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GenBank Vouchers
Georeferenced GenBank Vouchers
Mexico
UF_507899. (SRA: SRX5278589, go to GenBank) Mexico, Tabasco, Usumacinta River, opposite Emiliano Zapata (17.749685, -91.766995) .
UF_507899 (2015-0722). (16S: MK001775, 28S: MK001809, COI: MK001758, go to GenBank) ditto.
UF_507899 (2015-0726). (16S: MK001776, 28S: MK001810, COI: MK001759, go to GenBank) ditto.
GenBank Vouchers Not Yet Georeferenced
SAMN10774859. (SRA: SRX5278589, go to GenBank)
Z_12430 (2015-0509). (16S: MK001783, 28S: MK001817, COI: MK001766, go to GenBank)
Z_12441 (2015-0520). (16S: MK001781, 28S: MK001815, COI: MK001764, go to GenBank)
Z_12451 (2015-0531). (16S: MK001782, 28S: MK001816, COI: MK001765, go to GenBank)
Z_12460 (2015-0540). (16S: MK001780, 28S: MK001814, COI: MK001763, go to GenBank)
Z_12469 (2015-0551). (16S: MK001779, 28S: MK001813, COI: MK001762, go to GenBank)
Z_12471 (2015-0555). (16S: MK001784, 28S: MK001818, COI: MK001767, go to GenBank)
