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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 30, issue 1
J. Micropalaeontol., 30, 7–10, 2011
https://doi.org/10.1144/0262-821X10-016
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 30, 7–10, 2011
https://doi.org/10.1144/0262-821X10-016
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 May 2011

01 May 2011

Nomenclature to describe the transition from multiserial to uniserial chamber arrangement in benthic foraminifera

Michael A. Kaminski1, Claudia G. Cetean2,3, and Jarosław Tyszka3 Michael A. Kaminski et al.
  • 1Department of Earth Sciences, University College London, London WC1E 6BT, UK (Current address: Earth Sciences Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia).
  • 2Department of Palaeontology, Natural History Museum Cromwell Road, London SW7 5BD, UK.
  • 3Polish Academy of Sciences, Institute of Geological Sciences Cracow Research Centre, ul. Senacka 1, 31-002, Kraków, Poland.

Keywords: foraminifera, morphology, ontogeny, chamber arrangement

Abstract. We define terms used to describe the transition from a trochospiral, multiserial or biserial chamber arrangement to a uniserial chamber arrangement in benthic foraminifera. The morphological transition from a trocho-, multi- or biserial to a uniserial chamber arrangement may be abrupt, or form a morphological progression through transitional stages defined as ‘loosely biserial’, ‘lax-uniserial’ and, finally, ‘loosely uniserial’. The precise meanings of the intermediate stages ending in uniseriality are defined here by means of examples using foraminiferal models. We introduce the new terms ‘Cryptobiserial’, ‘Cryptotriserial’ and ‘Cryptotrochospiral’ to describe the chamber arrangement in genera with uniserial stages that preserve the sense of coiling of the previous trochospiral, triserial or biserial stages.

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