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Cornuspirella diffusa sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 11
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Image source: Cushman, J.A. 1929. The Foraminifera of the Atlantic Ocean. Part 6. Miliolidae, Ophthalmidiidae and Fischerinidae. Bull. U.S. Natl. Mus. 104.
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As this foram grows, the broad edge of the younger parts of the test may begin to branch away from each other. Here, the process is beginning with the formation of distinct lobes. Image courtesy of Gudmundur Gudmundsson, Icelandic Institute and Museum of Natural History. This image was originally published in J. Foram. Res. 32:308-318, and is used with permission.
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This example of the species has completely abandoned the typical coiling pattern and is growing in a rectilinear, branching pattern. The younger part of the test is to the left. Image courtesy of Gudmundur Gudmundsson, Icelandic Institute and Museum of Natural History. This image was originally published in J. Foram. Res. 32:308-318, and is used with permission.
