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 19 March 2026
Bivalvia | Venerida | Cyrenoidea | Cyrenoididae | Polymesoda placens
nominal species Cyrena placens Hanley, 1844
Cyrena placens Hanley, 1844 = Polymesoda placens
Hanley, 1844. Proc. Zool. Soc. London 1844: 160.
Hanley, 1856. Illustr. Descr. Cat. Rec. Bivalve Shells: 352, pl. 14, fig. 52.
Taxonomic Opinions
= Cyanocyclas placens (Hanley, 1844) — Simone, 2006: 298, fig. 1043.
= Polymesoda (s.s.) placens (Hanley, 1844) — Martens, 1900: 545, pl. 42, figs. 4-5b.
= Cyrena placens Hanley — Clessin, 1877: 111, pl. 15, figs. 4-5.
= Cyrena placens Hanley — Prime, 1870: 146.
= Cyrena placens Hanley — Prime, 1865: 20.
= Cyrena placens Hanl. — Hanley, 1856: 352, pl. 14, fig. 52.
= Cyrena placens Hanley, 1844 — Deshayes, 1855: 252.
