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Data last updated
Mon 1 Dec 2025
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Bivalvia
| Sphaerioida
| Sphaerioidea
| Sphaeriidae
| Sphaeriinae
| Sphaerium simile
nominal species Cyclas ponderosa Prime, 1852
= Sphaerium simile Taxonomic Opinions+ Sphaerium (s.s.) simile (Say, 1816) — Burch, 1975 + Sphærium simile Say — Prime, 1895 + Sphærium simile Say — Prime, 1870 + Sphærium sulcatum Lamarck — Prime, 1865 = Sphærium ponderosum Prime — Deshayes, 1854 = Cyclas ponderosa Nobis — Prime, 1853
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