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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
Stable URL: http://www.jstor.org/stable/3225984
Page Count: 9
You can always find the topics here!Topics: Diatoms, Cell walls, Specimens, Raw data, Taxa, Foxes, Biological taxonomies, Plants, Plankton, Herbaria
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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.
Transactions of the American Microscopical Society © 1978 American Microscopical Society