Skip to main content
Article
A Comparison of the Morphology and Ultrastructure of the Diatoms (Bacillariophyceae) Discostella stelligera (Cleve et Grunow) Houk et Klee and Discostella Elentarii Alfinito et Tagliaventi from Two New Zealand Fiordland Lakes
New Zealand Journal of Marine and Freshwater Research (2006)
  • Jessica M. Knapp, Bowling Green State University
  • Paula Furey, Bowling Green State University
  • Rex L. Lowe, Bowling Green State University
Abstract
Morphological and ultrastructural variability of the diatoms, Discostella stelligera and Discostella elentarii, were examined from lakes Te Anau and Manapouri, located in Fiordland on the South Island of New Zealand. The objectives of this study were to examine and compare the size variability, frustule morphology, and ultrastructural detail of these taxa, which were recently collected from locations of a different origin than the type localities. To support the current descriptions of the newly erected genus of Discostella and recently described species, D. elentarii, information on morphological characteristics across valve patterns was compared. A principal components analysis of the external valve features of D. stelligera and D. elentarii measured by light microscopy did not separate the two taxa. This close similarity in external morphology highlights the need to optically dissect the valves underneath the light microscope to clearly differentiate between the convex/concave nature of the D. stelligera valves compared with the flat valve of D. elentarii. New external and internal morphological details of D. elentarii were documented with a field emission scanning electron microscope.
Keywords
  • Cyclotella,
  • Discostell stelligera,
  • D. elentarii,
  • diatoms,
  • field emission microscope,
  • Lake Te anau,
  • Lake Manapouri,
  • New Zealand,
  • Morphology,
  • Ultrastructure
Publication Date
2006
DOI
10.1080/00288330.2006.9517433
Citation Information
Jessica M. Knapp, Paula Furey and Rex L. Lowe. "A Comparison of the Morphology and Ultrastructure of the Diatoms (Bacillariophyceae) Discostella stelligera (Cleve et Grunow) Houk et Klee and Discostella Elentarii Alfinito et Tagliaventi from Two New Zealand Fiordland Lakes" New Zealand Journal of Marine and Freshwater Research Vol. 40 (2006) p. 429 - 438
Available at: http://works.bepress.com/paula-furey/15/