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The study of the umbilical system in planktonic foraminifera in relation with depth of the Abderaz Formation at type section, IRAN

Meysam Shafiee Ardestani¹ and Ebrahim Ghasemi-Nejad¹

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1. Department of Geology, Faculty of Science, University of Tehran, Tehran,Iran

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Document Type:

Manuscript

Date:

Received 29 April 2009 22:28 UTC; Posted 30 April 2009

Subjects:

Ecology, Earth & Environment, Evolutionary Biology

Tags:

• Tegilla
• Abderaz formation
• planktonic foraminifera
• Pascal law
• Evolution
• Lip
• Portici

Abstract:

Prospect of changes in such umbilical structures as Lip, Portici and Tegilla throughout Turonian-Campanian was also investigated. The phylogenic trend show that Lip structure in primary morphogroups turns gradually to tegilla in more developed forms in which the opening become also entirely umbilical. Statistical an analysis showed that the trends of changes are correlatable with increase in water depth while a decrease in depth result in development of lip in the planktonic foraminifera studied. The changes are considered to be in accord with Pascal law.

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This document is licensed to the public under the Creative Commons Attribution 3.0 License

How to cite this document:

Shafiee Ardestani, Meysam and Ghasemi-Nejad, Ebrahim. The study of the umbilical system in planktonic foraminifera in relation with depth of the Abderaz Formation at type section, IRAN. Available from Nature Precedings <http://hdl.handle.net/10101/npre.2009.3206.1> (2009)

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