Electron Microscopy of Rotaliacean Wall Structures

Fecha de publicación: 1971

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Librería: ConchBooks, Harxheim, AlemaniaConchBooks

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Representative species of the rotaliacean genera Ammonia, Pseudorotalia, Pararotalia, Calcarina, Operculina, Elphidium, Cellanthus, Asterorotalia, and Rotalia were studied by aid of the scanning electron microscope. All were shown to build their primary chamber walls according to the bilamellar pattern and to possess an inner lining and an outer lamella composed of stacked calcite platelets, and a median layer composed of paired calcite crystals in an organic matrix. The walls of all species examined are optically radiate . All Rotaliacea possess a septal flap producing with the preceding septal face an interlocular space, which may be closed off partly at its border either primarily or by secondary lamination. Foraminal plates extending from the flap are present in all genera mentioned, except in Rotalia. An umbilical coverplate extending from the foraminal plate into the previous chamber (where it is attached to the previous foraminal plate) occurs in Ammonia, Pseudorotalia, Pararotalia, Asterorotalia, and in the early ontogenetic stages of Calcarina. Secondary lamination covers exposed surfaces of earlier chambers, as well as the sides of the interlocular spaces where individual lamellae thin out considerably. Thinning out of secondary lamellae is also observed in the electron microscope on the sides of ornamentational features which are all inflational and produced by outer lamellae only. 121 scanning electron micrographs illustrate the features described. 18 pp. + 21 b/w plates, br. gr. 8. …

N° de ref. del artículo W36175

Detalles bibliográficos

Título
Electron Microscopy of Rotaliacean Wall Structures
Autor
Hansen, H. J. & Reiss, Z.
Año de publicación
1971
Encuadernación
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ConchBooks

Harxheim, Alemania

Vendedor de 3 estrellas

Vendedor de IberLibro desde 1 de marzo de 2007

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Descripción de la tienda

Founded in 1985 we are specialized in worldwide literature on Mollusca and marine invertebrates. Our publishing house has meanwhile published approximately 60 titles on that field of interest. We have stocks of most available international books on Malacology and a huge amount of antiquarian literature, even of the latter most titles are only available once.

Especialidad

Weichtiere / Shells, Schnecken / Snails & Slugs, Muscheln / Bivalves, Tintenfische / Squids / Octopusses / Ammonites, Malacology, Conchology, Marine Biology