Diatoms, Cyclotella, "Schattenlinien", "Perlenreihen", "Hocker"
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.
Journal of the Iowa Academy of Science
© Copyright 1990 by the Iowa Academy of Science, Inc.
Hakansson, Hannelore and Carter, John R.
"An Interpretation of HUSTEDT's Terms "Schattenlinie", "Perlenreihe" and "Hocker" Using Specimens of the Cyclotella radiosa-complex, C. distinguenda, HUST., and C. cyclopuncta nov. sp.,"
Journal of the Iowa Academy of Science: JIAS: Vol. 97:
, Article 12.
Available at: http://scholarworks.uni.edu/jias/vol97/iss4/12