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 | Sphaeriida | Sphaerioidea | Sphaeriidae | Sphaeriinae | Sphaerium nucleus
nominal species Cyclas nucleus Studer, 1820
Cyclas nucleus Studer, 1820 = Sphaerium nucleus
Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 29.
Taxonomic Opinions
= Sphaerium nucleus (S. Studer, 1820) — Prié et al., 2023: Supplemental Material 2, p. 21.
= Sphaerium (s.s.) nucleus (Studer, 1820) — Bespalaya et al., 2023: Table 1.
= Sphaerium nucleus — Saito et al., 2022: Table S1.
= Sphaerium nucleus (S. Studer, 1820) — Príe et al., 2021: 2935, Table 1.
= Sphaerium nucleus — Múrria et al., 2020: Table S1 [S2].
= Sphaerium nucleus (Studer, 1820) — Vinarski et al., 2020: Appendix 1.
= Sphaerium nucleus (Studer, 1820) — Combosch et al., 2017: 197, Table 1.
= Sphaerium nucleus — Bespalaya et al., 2017: 2123, Table S2.
= Sphaerium (s.s.) nucleus — Fuentealba-Jara et al., 2017: 116.
= Sphaerium (Nucleocyclas) nucleus (Studer, 1820) — Vinarski & Kantor, 2016: 91.
= Sphaerium nucleus — Gonzáles et al., 2015: 5.
= Sphaerium nucleus (Studer, 1820) — Bieler et al., 2014: Table 1.
= Sphaerium nucleus — Clewing et al., 2013: 251.
= Sphaerium nucleus (Studer, 1820) — Fauna Europaea, 2012: [web].
= Sphaerium nucleus — Stunžėnas et al., 2011: 108.
= Sphaerium nucleus Studer, 1820 — Bogan, 2010: [web].
= Nucleocyclas nucleus (Studer, 1820) — Kantor et al., 2010: 292.
= Sphaerium nucleus — Schultheiß et al., 2008: Appendix I.
= Amesoda (Clessinicyclas) nucleus (Studer, 1820) — Starobogatov et al., 2004: 60, pl. 50, figs. 4-6.
= Sphaerium (s.s.) nucleus (Studer) — Lee & Ó Foighil, 2003: 249, table 1.
= Sphaerium (s.s.) nucleus (Studer, 1820) — Korniushin & Glaubrecht, 2002: 452.
= Sphaerium (Nucleocyclas) nucleus (S. Studer, 1820) — Falkner et al., 2001: 68.
+ Sphaerium corneum (Linnaeus) — Korniushin, 1998: 79.
+ Sphærium corneum Scopoli — Prime, 1895: 43.
= Sphaerium (Grüppe Corneola) corneum var. nucleus Studer — Clessin, 1877: 482, fig. 310.
= Sphærium corneum γ nucleum (Studer) — Westerlund, 1871: 154.
+ Sphærium corneum Scopoli — Prime, 1870: 152.
+ Sphærium corneum Linn. — Deshayes, 1855: 263.
= Cyclas nucleus mihi — Studer, 1820: 29.
