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
Wed 04 February 2026
Bivalvia | Sphaeriida | Sphaerioidea | Sphaeriidae | Sphaeriinae | Pisidium dubium
nominal species Cyclas dubia Say, 1817
Cyclas dubia Say, 1817 = Pisidium dubium
Say, 1817. Nich. Encyc. 2: pl. 1, fig. 10.
Taxonomic Opinions
= Pisidium dubium (Say, 1817) — Bespalaya et al., 2023
= Pisidium dubium (Say, 1817) — Jihad, 2023
= Pisidium dubium — Saito et al., 2022
= Pisidium (s.s.) dubium (Say) — Voode, 2017
= Pisidium dubium (Say, 1817) — Mouthon & Forcellini, 2017
= Pisidium (s.s.) dubium — Bespalaya et al., 2017
= Pisidium (s.s.) dubium — Fuentealba-Jara et al., 2017
= Pisidium dubium — Clewing et al., 2013
= Pisidium dubium (Say, 1817) — ITIS, 2012
= Pisidium dubium — Stunžėnas et al., 2011
= Pisidium dubium Say, 1817 — Bogan, 2010
= Pisidium dubium — Schultheiß et al., 2008
= Pisidium (s.s.) dubium (Say, 1816) — Mackie, 2007
= Pisidium dubium — Kim et al., 2005
= Pisidium dubium (Say) — Lee & Ó Foighil, 2003
= Pisidium (s.s.) dubium (Say, 1816) — Korniushin & Glaubrecht, 2002
= Pisidium dubium (Say, 1817) — Lee & Ó Foighil, 2002
= Pisidium dubium (Say, 1817) — Park & Ó Foighil, 2000
= Pisidium (s.s.) dubium (Say, 1817) — Cooley & Ó Foighil, 2000
= Pisidium dubium (Say, 1817) — Turgeon et al., 1998
= Pisidium dubium (Say) — Mackie et al., 1980
= Pisidium (s.s.) dubium (Say, 1816) — Burch, 1975
= Pisidium dubium (Say, 1816) — Herrington, 1962
= Pisidium (s.s.) dubium (Say) — Kuiper, 1962
+ Pisidium virginica Bourguignat — Prime, 1870
+ Pisidium virginicum Bourguignat — Prime, 1865
= Sphærium dubium Say — Deshayes, 1853
= Pisum dubium Say — Deshayes, 1853
= Pisidium dubium Gould — Prime, 1852
+ — Hanley, 1843
= Cyclas dubia Say — Ferussac, 1835
= Cyclas (Phymesoda) dubia Say — Rafinesque, 1820
= Cyclas (Corneocyclas) dubia Say — Blainville, 1818
