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Hansen, H. J. (1981). On Lorentz Spengler and a neotype for the foraminifer Calcarina spengleri. Bulletin of the Geological Society of Denmark. 29(4): 191–201., available online at (https://doi.org/10.37570/bgsd-1980-29-14) page(s): plate 4, figs. 1-2 (neotype). From sand contained in Buccinum cassideum from East India. 1 - umbilical side of neotype; 2 - spiral side of neotype. Both 55 x .
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Calcarina hispida sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 108
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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: Cushman, J.A. 1915. A Monograph of the Foraminifera of the North Pacific Ocean. Part V. Rotaliidae. Bull. U.S. Nation. Mus 71: vii+87 pp.+31 pls.
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Image source: Cushman, J.A. 1915. A Monograph of the Foraminifera of the North Pacific Ocean. Part V. Rotaliidae. Bull. U.S. Nation. Mus 71: vii+87 pp.+31 pls.
