Shell Microstructure of Septaliphoria excitata (Smirnova) (Rhynchonellida, Cyclothyrididae) from the Berriasian of the Russian Platform

Shell Microstructure of Septaliphoria excitata (Smirnova) (Rhynchonellida, Cyclothyrididae) from the Berriasian of the Russian Platform

The surface of the primary shell layer of Septaliphoria excitata (Smirnova, 1978) bears rhombic imprints of the epithelial cells that secrete the periostracum. The primary layer is pierced with micropores. The bundles of fibers of the secondary layer are directed at various angles, up to a right ang...

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Veröffentlicht in:Paleontological journal 2021-03, Vol.55 (2), p.145-150
Hauptverfasser: Smirnova, T. N., Zhegallo, E. A.
Format: Artikel
Sprache:eng
Schlagworte:
Earth and Environmental Science
Earth Sciences
Epithelial cells
Epithelium
Fibers
Microstructure
Paleontology
Platforms (geology)
Secretion
Shells
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Zusammenfassung:The surface of the primary shell layer of Septaliphoria excitata (Smirnova, 1978) bears rhombic imprints of the epithelial cells that secrete the periostracum. The primary layer is pierced with micropores. The bundles of fibers of the secondary layer are directed at various angles, up to a right angle to the neighboring bundles.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030121020143