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Document Type

Article

Keywords

Diatoms, Cyclotella, "Schattenlinien", "Perlenreihen", "Hocker"

Abstract

With the help of light- and scanning electron micrographs HUSTEDT'S terms "Schattenlinie", "Perlenrcihe", and "Hocker" are explained using specimens in the Cydotella radiosa complex, and C. distinguenda HUST. The complicated history of C. operculata (AG.) KUTZ., published elsewhere, has shown that C. distinguenda HUST. is the correct name to be used for this taxon. In this connection the new nomenclatural combination C. distinguenda var. unipunctata nov. comb. is proposed.

Morphological differences are discussed and the possibility of different "unipunctata" species is shown. Distinct morphological features found indicate the necessiry to describe a new species: C. cyclopuncta nov. sp. rather than elevating C. distinguenda var. unipunctata (HUST.) HAKANSSON & CARTER or FRICKE's "C. comta var. unipunctata to specific rank.

Publication Date

December 1990

Journal Title

Journal of the Iowa Academy of Science

Volume

97

Issue

4

First Page

153

Last Page

156

Copyright

© Copyright 1990 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf