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Observations on the Microanatomy of Coccolithus Pelagicus and Cricosphaera Carterae, With Special Reference to the Origin and Nature of Coccoliths and Scales

Published online by Cambridge University Press:  11 May 2009

I. Manton  and
G. F. Leedale
I. Manton
Affiliation:
Botany Department, Leeds University
G. F. Leedale
Affiliation:
Botany Department, Leeds University
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Extract

Coccolith structure, mode of origin and arrangement on the cell surface have been investigated in two marine coccolithophorids, Coccolithus pelagicus (Wall.) Schiller and Cricosphaera carterae (Braarud et Fagerland) Braarud, by means of light microscopy and electron microscopy of whole mounts and sections. The presence of flagellar bases in Coccolithus pelagicus is also demonstrated in spite of the fact that the cells of this phase of the life-history are non-motile. In both organisms the coccoliths are shown to be accompanied by unmineralized scales, details of which are illustrated; in particular, each coccolith is attached to the margin of an unmineralized oval plate which completely covers the central ‘pore’ on the side towards the subtending cell. Scales and coccoliths arise within the cisternae of the single Golgi body in a manner closely resembling the origin of scales in species of Chrysochromulina. It is therefore suggested that the coccoliths of the two taxa investigated can be interpreted as modified (and calcined) scale rims.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 49 , Issue 1 , February 1969 , pp. 1 - 16
Copyright
Copyright © Marine Biological Association of the United Kingdom 1969

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