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Fig. 1. Chamber arrangement and apertural face. Schematic, not to scale. In part after Hottinger, 2000. A: biserial-cuneiform; B: biserial – textulariid; (Hottinger, 2006; fig. 37.6-7 [1] CC/BY-NC-SA)


  • according to Hottinger (2006):

BISERIAL - trochospiral chamber arrangement with about 180° between consecutive chambers, thus producing two rows of chambers. See serial disposition of chambers.


Hottinger (2006), Illustrated glossary of terms used in foraminiferal research. Carnets de Géologie, Memoir 2, ISSN 1634-0744

Hottinger (2000), Functional morphology of benthic foraminiferal shells, envelopes of cells beyond measure. In: Lee J.J. & Hallock P. (eds.), Advances in biology of Foraminifera.- Micropaleontology, New York, vol. 46, suppl. 1, p. 57-86.

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A. Simulation of the biserial shell with 12 chambers: side view
B. Simulation of the biserial shell: virtual axial section of the shell from Fig. A
C. Simulation of the biserial shell: virtual thin-section of the shell from Figs A, B