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Journal Article

Morphological Variation of Cymbella delicatula and C. hustedtii from Northern Lake Michigan

John C. Kingston
Transactions of the American Microscopical Society
Vol. 97, No. 3 (Jul., 1978), pp. 311-319
Published by: Wiley on behalf of American Microscopical Society
DOI: 10.2307/3225984
Stable URL: http://www.jstor.org/stable/3225984
Page Count: 9

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Topics: Diatoms, Cell walls, Specimens, Raw data, Taxa, Foxes, Biological taxonomies, Plants, Plankton, Herbaria
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Morphological Variation of Cymbella delicatula and C. hustedtii from Northern Lake Michigan
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Abstract

Morphological variation of two Cymbella species from a collection at South Fox Island, Lake Michigan, is discussed. Populations are compared to treatments in the taxonomic literature, and variation indices are used to help determine whether distinct growth forms or varieties are present. Although Cymbella delicatula initially appeared to have three defined morphological series, these are interpreted as part of one continuously variable population. The Cymbella hustedtii population appears to be a single variable group. Descriptions and photographs accounting for intraspecific variation are given for both species, and comparisons are made to other Cymbella species in the collection.

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