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Identification

Physella

 

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This resource may not be downloaded and used without permission of the copyright holder except for educational fair use.

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Image of: Physella


Caption

Physella. Two species of the same genus. One species is darkly pigmented, while the other lacks pigment. But there are also other differences - in the internal anatomy and in small but consistent differences in the shells.

Contributors

Dr. John B. Burch, Ph.D. external link (photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan


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