The existence of protozoa in the intestine of frogs has been known since the observations of van Leeuvenhoek, 1683. Nearly two centuries elapsed before any considerable advance in the study of intestinal protozoa was made. The observations of Dobell ( 1909) initiated the modem phase in the investigation of the enteric protozoa of amphibia. In this work, on the fauna of frogs and toads, many of the species now recognized were described.
Proceedings of the Iowa Academy of Science
©1955 Iowa Academy of Science, Inc.
Mcarthur, William Henry
"Observations of the Enteric Protozoa of Rana pipiens during Larval Development and Metamorphosis,"
Proceedings of the Iowa Academy of Science, 62(1), 640-651.
Available at: https://scholarworks.uni.edu/pias/vol62/iss1/79