nominal species Pisidium pileus Clessin, 1873

Pisidium pileus Clessin, 1873

Clessin, 1873. Corrspbl. d. zool.-mineral. Ver. Regensburg: 160.
Clessin, 1877. Conch. Cab. 9(3): 47, pl. 5, figs. 18-20.

=

Taxonomic Opinions

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