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 | 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: 259.
+ Musculium transversum (Say, 1829) — Burch, 1975: 48.
+ Sphærium transversum Say — Prime, 1895: 41.
+ Sphærium transversum Say — Prime, 1870: 160.
+ Sphærium transversum Say — Prime, 1865: 48.
= Sphærium gracilis Prime — Deshayes, 1855: 268.
= Cyclas gracilis Nobis — Prime, 1853: 274.
