File:Pyrgulopsis scalariformis shell.jpg

Pyrgulopsis_scalariformis_shell.jpg(182 × 353 pixels, file size: 32 KB, MIME type: image/jpeg)

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English: Drawing of apertural view of the shell of Marstonia scalariformis, syn. Pyrgulopsis scalariformis.
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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 13.

This image is copy from Wolf. 1869. Am. Jour. Conch., volume V., page 198, plate xvii, figure 3.

Cropped and retouched by User:Snek01.
Author Wolf
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current21:31, 24 July 2009Thumbnail for version as of 21:31, 24 July 2009182 × 353 (32 KB)Snek01 (talk | contribs){{Information |Description={{en|Drawing of apertural view of the shell of ''Pyrgulopsis scalariformis''.}} |Source=Call R. E. & Pilsbry H. A. 1886. ''On Pyrgulopsis, a new genus of rissoid mollusk, wit

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