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Structure of the shell wall of Raskiniella plana (subclass Spirillinana)
- Authors: Mikhalevich V.I.1
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Affiliations:
- Zoological Institute of the Russian Academy of Sciences
- Issue: Vol 521, No 1 (2025)
- Pages: 280-284
- Section: Articles
- URL: https://ogarev-online.ru/2686-7389/article/view/306226
- DOI: https://doi.org/10.31857/S2686738925020187
- ID: 306226
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Abstract
Among the four classes of multicameral foraminifera with a secretive calcareous shell wall, the ultrastructure of the wall is known in three of them – in the classes Rotaliata Mikhalevich, 1980, Miliolata Saidova, 1981 and Nodosariata Mikhalevich 1992. It was believed that the wall of Spirillinata Mikhalevich, 1992 was formed by one or more large crystals. In this study, it was found that in one of the typical representatives of this class, Raskiniella plana (previously classified as Spirillina plana, Wiesner, 1931), the entire shell is formed by amorphous (not crystalline) CaCO3. Previously, amorphous calcareous skeletons were known in some unicellular algae and multicellular eukaryotes, but in foraminifera, the skeleton of the entire adult shell, completely formed by the amorphous form of CaCO3, was discovered for the first time.
About the authors
V. I. Mikhalevich
Zoological Institute of the Russian Academy of Sciences
Author for correspondence.
Email: mikha07@mail.ru
St. Petersburg, Russian Federation
References
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