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Notes on the wall structure of the Globigerinacea

Emile A. Pessagno and Kei Miyano
Notes on the wall structure of the Globigerinacea
Micropaleontology (1968) 14 (1): 38-50


Electron microscope, phase contrast, and dark field illumination analyses of Globigerinacea indicate that septal walls in both axial and horizontal sections are microgranular hyaline in character. The primary outer wall of Cretaceous Globigerinacea is microgranular hyaline, whereas Cenozoic Globigerinacea may have outer walls which are entirely microgranular hyaline, both radial hyaline and microgranular hyaline, or rarely, entirely radial hyaline. Mesopelagic forms of Globorotalia truncatulinoides, for example, possess an outer wall divided into (1) a radial hyaline 'calcite crust' composed of euhedral calcite prisms oriented with their C-axes normal to the surface of the test and (2) an inner laminated layer composed of heterogeneous microgranules of hyaline calcite.

ISSN: 0026-2803
Serial Title: Micropaleontology
Serial Volume: 14
Serial Issue: 1
Title: Notes on the wall structure of the Globigerinacea
Pages: 38-50
Published: 1968
Text Language: English
Publisher: American Museum of Natural History, New York, NY, United States
Accession Number: 1968-050833
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1968
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