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Siphogenerina dimorpha sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 76
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Image source: Cushman, J.A. 1923. The Foraminifera of the Atlantic Ocean. Part 4. Lagenidae. Bull. U.S. Natl. Mus. 104.
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Image source: Cushman, J.A. 1921. Foraminifera of the Philippine and adjacent seas. Bull. U.S. Natl. Mus. 100(4).
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Image source: Höglund, H. 1947. Foraminifera in the Gullmar fjord and the Skagerak. Zoologiska Bidrag från Uppsala 26: 1-328 + 32 pls. Uploaded with written permission from the copyright owners Annalena Höglund and Jan Höglund.
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Image source: Cushman, J.A. 1913. A Monograph of the Foraminifera of the North Pacific Ocean. Part III. Lagenidae. Bull. U.S. Nation. Mus 71: ix+125 pp.+47 pls.