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Fig. 1. Endoskeletal patterns in discoidal shells. A-D: disposition of apertural axes. A: radial axes alternating in radial position from one stolon layer to the next. This is the most common disposition in imperforate forms with annular stages of growth. B: radial axes superposed in radial position on all stolon planes. C: crosswise-oblique stolon axes alternating in radial position from one stolon plane to the next. D: crosswise-oblique stolon axes superposed on all stolon planes. This pattern characterizes all members of the orbitolitid family. Schematic, not to scale; (Hottinger, 2006; fig. 47)[1] CC/BY-NC-SA)


  • according to Hottinger (2006):

STOLON is a tubular opening in a chamber wall whose length is greater than its diameter, forming an intercameral foramen that permits communication between consecutive chambers or between cyclical or subsidiary chamberlets of one or two consecutive instars.

See also


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

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