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
Thu 22 January 2026
Bivalvia | Sphaeriida | Sphaerioidea | Sphaeriidae | Sphaeriinae | Sphaerium simile
nominal species Cyclas ponderosa Prime, 1852
Cyclas ponderosa Prime, 1852 = Sphaerium simile
Prime, 1852. Proc. Boston Soc. Nat. Hist. 4: 157.
Prime, 1853. Proc. Boston Soc. Nat. Hist. 4: 282.
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, 1853
= Cyclas ponderosa Nobis — Prime, 1853
