Publications by David Mann:back up
PhD Dissertation, University of Bristol
Nitzschia sect. Nitzschia
Chapter 18.104.22.168 (pdfs)
In this dissertation, as a starting point, I implemented all the changes to Grunow's subgeneric classification that had been implemented by Friedrich Hustedt. Thus, the sect. Nitzschia included almost all sigmoid Nitzschia species, including the former sections Sigmata, Sigmoideae and Obtusae. My conclusion was that Hustedt's changes were incorrect and that the sigmoid Nitzschia species do not form a natural group.
Text (5 Mb)
Figures (8Mb) (Figs 289-337, 539-550, 839-885; LM, TEM, SEM) (NB these plates also contain some illustrations of other sections of Nitzschia)