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RECORD NUMBER: 121 OF 173

OLS Field Name OLS Field Data
Main Title Observations on North American Populations of 'Stephanodiscus' (Bacillariophyceae) Species Attributed to Friedrich Hustedt.
Author Theriot, E. ; Stoermer, E. F. ;
CORP Author Michigan Univ., Ann Arbor. Great Lakes Research Div.;Environmental Research Lab.-Duluth, MN.
Year Published 1982
Report Number EPA-R-807405; EPA/J-82-395;
Stock Number PB84-112283
Additional Subjects Identifying ; Diatoms ; Morphology ; Distribution(Property) ; Taxonomy ; North America ; Great Lakes ; Reprints ; Stephanodiscus
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB84-112283 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 11p
Abstract
Stephanodiscus alpinus is moderate in diameter, concentrically undulate and heavily silicified. Spine placement on valves from North American populations is variable and may differ from European material. North American specimens also tend to be more coarsely fasciculate. Stephanodiscus tenuis is distinguished by a rosette of areolae in the valve center. Stephanodiscus dubius is heavily silicified and concentrically undulate. The presence of alveoli near the margin of S. dubius distinguishes it from other Stephanodiscus species. (Copyright (c) 1982, by the American Microscopical Society, Inc.)