nominal species Pisidium demissum Clessin, 1874

Pisidium demissum Clessin, 1874

Clessin, 1874. Bull. Soc. Vaud. Sci. Nat. 13: 149. [nomen nudum]
Clessin, 1877. Conch. Cab. 9(3): 71, pl, 8, figs. 19-21.

=

Taxonomic Opinions

= Pisidium (Gruppe Fossarina) demissum Clessin — Clessin, 1877

= Pisidium demissum sp. nov. — Clessin, 1874