A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae)
By: Robert Hershler.
Series: Smithsonian contributions to zoology ;; no. 554
Publisher: Smithsonian Institution Press
Published: 1994
Place of publication: Washington, D.C
Language: eng
Number of pages: 115
Subjects: Pyrgulopsis -- North America -- Classification.
Genres: Classification.
Notes: Includes bibliographical references (p. 111-115).