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 transversum
nominal species Cyclas gracilis Prime, 1852
Cyclas gracilis Prime, 1852 = Sphaerium transversum
Prime, 1852. Proc. Boston Soc. Nat. Hist. 4: 156.
Prime, 1853. Proc. Boston Soc. Nat. Hist. 4: 274.
Taxonomic Opinions
+ Musculium transversum (Say, 1829) — Mackie, 2007
+ Musculium transversum (Say, 1829) — Burch, 1975
+ Sphærium transversum Say — Prime, 1895
+ Sphærium transversum Say — Prime, 1870
+ Sphærium transversum Say — Prime, 1865
= Sphærium gracilis Prime — Deshayes, 1853
= Cyclas gracilis Nobis — Prime, 1853
