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Image source: Cushman, J.A. 1918. The Foraminifera of the Atlantic Ocean. Part I. Astrorhizidae. 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: Goës, A. 1894. A Synopsis of the Arctic and Scandinavian recent marine Foraminifera hitherto discovered. Kong. Svenska Vetenskaps-Akademiens Handlingar 25(9): 1-127 + 25 pls. (Notae numerorum tenues mensuram indicant millimetricam).
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Image source: Cushman, J.A. 1910. A Monograph of the Foraminifera of the North Pacific Ocean. Part I. Astrorhizidae and Lituolidae. Bull. U.S. Nation. Mus 71: xiv+134 pp.
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Image source: Cushman, J.A. 1921. Foraminifera of the Philippine and adjacent seas. Bull. U.S. Natl. Mus. 100(4).
