overcome the main problem of how to clearly define Carboniferous marattialean
species, proposals for natural species are forthcoming in publications
based on combining stomatal and in-situ spore data, and
in the proposals will be chemotaxonomic data from FTIR (functional,
deformed C, H, and O groups), and other phytochemical molecules.
separated from the fertile data base: Sydneia manleyi nov.
gen et sp.
Pšenička et al 2003 ( a newly formally unnamed family of
marattialean fern), and Acitheca polymorpha var. alii sp.
P. unita group, two new species are proposed, and
arborescens, cyathea, unita, and polymorpha are truly
Funded by: Petroleum Research Fund administered by the American Chemical
Natural Sciences and Engineering Research Council of Canada, Ottawa
The Grant Agency of the Academy
of Sciences, and Research Program of the Ministry of Culture of the