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Optimized skeletal morphologies of silicoflagellate genera Dictyocha and Distephanus

Published online by Cambridge University Press:  08 April 2016

Kevin McCartney  and
David E. Loper
Kevin McCartney
Affiliation:
University of Maine at Presque Isle, Presque Isle, Maine 04769
David E. Loper
Affiliation:
Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, Florida 32306
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Abstract

Several groups of siliceous microorganisms possess a skeletal latticework of interconnected rods. Skeletal configurations of one of these groups, the silicoflagellates, can be produced by a simple mathematical model that minimizes the apical surface area for a given basal area and internal volume. A similar model that minimizes the total length of the skeletal elements, and thus the silica utilization and skeletal weight, produces configurations that are generally less common in silicoflagellates. The diversity of silicoflagellate skeletal morphologies suggests that both the minimization of apical surface area and the conservation of skeletal material may be important factors in skeletal design. The two most important morphologies found in modern oceans, the four-sided Dictyocha and the six-sided Distephanus, can co-occur in an environment where both factors have some relative importance. However, these models do not explain the range of silicoflagellate skeletal morphology found in nature.

Type
Articles
Information
Paleobiology , Volume 15 , Issue 3 , Summer 1989 , pp. 283 - 298
Copyright
Copyright © The Paleontological Society 

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