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Roughly spherical foraminiferan with coarse perforations on the ventral surface (above right). The dorsal surface is composed of a brownish spiral of increasing sized flat chambers; the whole specimen appears to be a benthic foraminiferan with an inflated chamber (similar to those in planktonic species) on the ventral side. Our specimens have been examined by an expert (S. Richardson) and appear similar to the dispersal form of the genus Tretomphalus, a shallow-water benthic group. Most, though not all, are empty shells.
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Roughly spherical foraminiferan with coarse perforations on the ventral surface (above right). The dorsal surface is composed of a brownish spiral of increasing sized flat chambers; the whole specimen appears to be a benthic foraminiferan with an inflated chamber (similar to those in planktonic species) on the ventral side. Our specimens have been examined by an expert (S. Richardson) and appear similar to the dispersal form of the genus Tretomphalus, a shallow-water benthic group. Most, though not all, are empty shells.
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Möbius, K. A. (1880). Beiträge zur Meeresfauna der Insel Mauritius und der Seychellen. Foraminifera von Mauritius. Berlin. 73 pp., available online at (http://www.biodiversitylibrary.org/item/177708#page/9/) page(s): p. 98 pl. 10 fig. 6-9
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Möbius, K. A. (1880). Beiträge zur Meeresfauna der Insel Mauritius und der Seychellen. Foraminifera von Mauritius. Berlin. 73 pp., available online at (http://www.biodiversitylibrary.org/item/177708#page/9/) page(s): p. 98 pl. 10 fig. 6-9
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Image source: Cushman, J.A. 1931. The Foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae. 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: 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.