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Article: A discussion and proposal concerning the use of the term calcispheres

Publication: Palaeontology
Volume: 52
Part: 2
Publication Date: March 2009
Page(s): 343 348
Author(s): Gerard J. M. Versteegh, Thomas Servais, Michael Streng, Axel Munnecke and Daniel Vachard
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How to Cite

VERSTEEGH, G. J. M., SERVAIS, T., STRENG, M., MUNNECKE, A., VACHARD, D. 2009. A discussion and proposal concerning the use of the term calcispheres. Palaeontology52, 2, 343–348.

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The terminology and grouping of spherical, calcareous microfossils of unknown biological affinity, usually referred to as calcispheres, are diffuse. The term calcispheres is inconsistently used, the morphological and taxonomical concepts are mostly ill-defined and a formal definition is lacking. To resolve this issue, we propose, in analogy with the erection of the Acritarcha for organic microfossils of unknown origin, a new group called Calcitarcha, including all calcareous microfossils with a central cavity for which the biological affinities remain unknown.
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