Alt Title

A statistical study of microfossils by application of mass data processing and computer techniques

Publication Date

1967

Document Type

Dissertation/Thesis

First Advisor

Frost, Stanley H., 1939-||Rubel, Daniel N.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Geology

LCSH

Geology; Paleontology--Eocene

Abstract

Samples of Lepldocvcllna (Leoldocycllna) macdonaldi from the late Eocene of Central America were investigated and compared statistically by analysis of variance. Samples were studied from collecting localities at Ixtapa and Simojovel in the State of Chiapas, Mexico. It was considered necessary to take into account measurements of all aspects of the test. Two of these parameters, relationship of protoconch to duteroconch and type of periembryonic chambers, showed no significant variation at the specific level. Two other parameters, height of the fifth equatorial chamber and height of lateral chambers, proved to yield significant variation for every comparison made. Significant morphological variation was found between specimens from Ixtapa and Simojovel. Significant morphological variance was also found between specimens from two collecting localities near Simojovel as compared with all the others. The simple analysis of variance was found to yield valid results while the complex analysis of variance did not. The objective approach was postulated as being necessary for definition and re-examination of low level taxa.

Comments

Includes bibliographical references.||Includes illustrations and map.

Extent

iv, 58 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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