| 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! 
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 Bivalvia | Sphaerioida | Sphaerioidea | Sphaeriidae | Sphaeriinae | Euglesa species Euglesa rotundata (Prime, 1852): synonymy0 specimens
 | Pisidium rotundatum Prime, 1852Prime, 1852. Proc. Boston Soc. Nat. Hist. 4: 164.
 Prime, 1852. Boston J. Nat. Hist. 6(3): 357, pl. 11, figs. 19-21.
 
  Prime, 1865. Smithsonian Misc. Coll. (145): 72, figs. 81-82. 
 Pisidium obtusale — Herrington (1962)
 Pisidium (Cyclocalyx) ventricosum form rotundatum — Clarke (1973), Burch (1975)
 Pisidium ventricosum f. rotundatum — Mackie et al. (1980)
 Pisidium rotundatum — Turgeon et al. (1998), Mackie (2007), Bogan (2010), ITIS (2012), Saito et al. (2022)
 Euglesa rotundata — Vinarski et al. (2020)
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 | Corneocyclas tremperi Hannibal, 1912Hannibal, 1912. Proc. Malac. Soc. London 10(2): ??.
 
 Pisidium (Cyclocalyx) ventricosum form rotundatum — Burch (1975)
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 | Pisidium rotundarum Herrington, 1965Herrington, 1965. Nautilus 79(2): ??.
 
 Pisidium (Cyclocalyx) ventricosum form rotundatum — Burch (1975)
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 Taxonomic History (since 1900)Pisidium obtusale — Herrington (1962)Pisidium (Cyclocalyx) ventricosum form rotundatum — Clarke (1973), Burch (1975)
 Pisidium ventricosum f. rotundatum — Mackie et al. (1980)
 Pisidium rotundatum — Turgeon et al. (1998), Mackie (2007), Bogan (2010), ITIS (2012), Saito et al. (2022)
 Euglesa rotundata — Vinarski et al. (2020)
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