Image: Pyrgulopsis nevadensis operculum
Pyrgulopsis_nevadensis_operculum.jpg (106 × 144 pixels, file size: 10 KB, MIME type: image/jpeg)
Description: Drawing of operculum of Pyrgulopsis nevadensis.
Title: Pyrgulopsis nevadensis operculum
Credit: Call R. E. & Pilsbry H. A. 1886. On Pyrgulopsis, a new genus of rissoid mollusk, with description of two new forms. Proceeding Davenport Academy of Natural Sciences, volume V., page 9-14. Plate II., figure 9. Cropped and retouched by User:Snek01.
Author: Henry Augustus Pilsbry
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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