In this image a Bursaria can be seen. This organism was identified using
Fresh-water Invertebrates of the United States: Protozoa to Mollusca on pg. 143 fig. 316.
This picture shows a Litonotus which can be identified in Fresh-water
Invertebrates of the United States: Protozoa to Mollusca on pg. 132 fig. 285.
Bibliography
Pennak, Robert W. 1989. Fresh-water Invertebrates of the United States: Protozoa to Molusca. New York (NY): Wiley.
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