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Unionidae

Margaritiferidae

Hyriidae

Etheriidae

Mycetopodidae

Iridinidae


Species & Genus Richness by
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Summary

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Central America

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Species Richness & Endemism by
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Data last updated
Mon 1 Dec 2025

Publication Studer (1820): summary

publication summary

Full Citation

Studer, S. 1820. Systematisches Verzeichniss der bis jetzt bekannt gewordenen Schweizer-Conchylien. 32 pp. Available electronically.

Attributed Nominal Species

Unio dilatatus Studer, 1820 = Unio nanus

Bruguière, 1797. Encycl. Méth. 2: pl. 249, fig. 4a-b [as Unio sp.].
Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.

Unio inflatus Studer, 1820 = Unio nanus

Draparnaud, 1806. Hist. Moll. France: pl. 11, figs. 2. [in part]
Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(misidentified reference to Unio pictorum Draparnaud, 1806)

Cyclas minima Studer, 1820 = Euglesa casertana

Draparnaud, 1806. Hist. Moll. France: pl. 10, figs. 11-12 [as ‘Cyclas fontinalis’]. [in part]
Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 29.
(new name for Cyclas fontinalis Draparnaud, 1806)

Cyclas nucleus Studer, 1820 = Sphaerium nucleus

Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 29.

Unio ovatus Studer, 1820 = Unio nanus

Schröter, 1779. Gesch. Flußconch.: pl. 3, figs. 2.
Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(homonym of Unio ovatus Say, 1817)

Unio planus Studer, 1820 = Unio nanus

Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.

Unio rostratus Studer, 1820 = Unio nanus

Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(homonym of Unio rostrata Lamarck, 1819)

Unio sinuatus Studer, 1820 = Unio nanus

Schröter, 1779. Gesch. Flußconch.: 182, pl. 2, fig. 2 [Mya testa crassa]. [non-binomial]
Studer, 1820. System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(homonym of Unio sinuata Lamarck, 1819)

Taxonomic Opinions

Anodonta anatina Drap.

Anodonta cygnea
+ Mytilus cygneus Schröter, 1779

Anodonta cygnea = Anodonta anatina

Cyclas amnica Drap. = Pisidium amnicum

Cyclas fontinalis Drap. = Euglesa casertana

Cyclas lacustris Drap. = Sphaerium lacustre

Cyclas nucleus mihi = Sphaerium nucleus

Cyclas rivalis Drap. = Sphaerium corneum

Unio dilatatus mihi = Unio nanus

Unio inflatus mihi = Unio nanus
+ Unio pictorum Draparnaud, 1806

Unio inflatus mihi = Unio mancus

Unio ovatus mihi = Unio nanus

Unio planus mihi = Unio nanus

Unio rostratus mihi = Unio nanus

Unio sinuatus mihi = Unio nanus
 
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