Journal
PALAEONTOLOGY
Volume 52, Issue -, Pages 343-348Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1475-4983.2009.00854.x
Keywords
calcareous microfossil; calcisphere; Calcitarcha; Nomenclature; pithonelloid; gilianelloid
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Funding
- USTL
- Alexander von Humboldt Foundation
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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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