nominal species Sphaerium oblongum Clessin, 1877

Sphaerium oblongum Clessin, 1877

Clessin, 1877. Conch. Cab. 9(3): 83, pl. 9, figs. 25-27.
Clessin, 1877. Deutsche Excurs. Moll. Fauna: 484.

=

Taxonomic Opinions

+ Sphaerium (Grüppe Corneola) corneum var. firmum Clessin — Clessin, 1877