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
Fri 13 February 2026
Bivalvia | Sphaeriida | Sphaerioidea | Sphaeriidae | Sphaeriinae | Sphaerium triangulare
nominal species Cyclas triangularis Say, 1829
Cyclas triangularis Say, 1829 = Sphaerium triangulare
Say, 1829. New Harm. Dissem. 2(23): 356.
Taxonomic Opinions
= Sphaerium triangulare (Say, 1829) — Czaja et al., 2023: 89.
= Sphaerium triangulare (Say, 1829) — Ituarte, 2020: 405.
= Sphaerium triangularis Say, 1829 — Bogan, 2010: [web].
+ Sphaerium striatinum (Lamarck, 1818) — Mackie, 2007: 235.
= Sphaerium triangulare (Say) — Contreras-Arquieta, 2000: 45.
+ Sphaerium (s.s.) striatinum (Lamarck, 1818) — Burch, 1975: 56.
+ Sphaerium (s.s.) striatinum (Lamarck, 1818) — Clarke, 1973: 145.
+ Sphaerium striatinum (Lamarck, 1818) — Herrington, 1962: 27.
= Sphærium triangulare (Say) — Pilsbry, 1904: 785, pl. 53, figs. 4-4a.
= Sphærium triangulare (Say, 1829) — Martens, 1900: 551.
+ Sphærium striatinum Lamarck — Prime, 1895: 37.
= Sphærium (s.s.) triangulare (Say, 1829) — Fischer & Crosse, 1894: 651.
= Sphærium triangulare Say — Prime, 1870: 160.
= Sphærium triangulare Say — Prime, 1865: 36, fig. 28.
= Cyclas triangularis Say — Ferussac, 1835: 29.
