The diatom genus Stauroneis comprises far more species than actually known.
This detailed morphological and taxonomical study of Stauroneis in samples
from both the Arctic and (sub-)Antarctic Regions has resulted in the
description of 40 new Stauroneis taxa. The 'catch-all' taxoa
Stauroneis phoenicenteron, St. anceps and St. obtusa are thoroughly investigated and a
lot of new (related) taxa are split off and described. Five taxa are only
described provisionally, two from the Antarctic and two from the Arctic
Region. It is possible that they represent also new species but more research
on other populations should clarify their status.
In total, 63 different Stauroneis taxa have been found. There is a clear
separation in the genus Stauroneis between taxa occurring in the Arctic and
taxa that have been found in the (sub-)Antarctic. Only five taxa (St.
gracilis, St. subgracilis, St. kriegeri, St. acuta and St. heinii) have been
found in both regions. Apart from these 5 taxa, 36 taxa have been found in
the Arctic Region whereas the (sub-)Antarctic Region yielded another 20
taxa. This clear distinction between the Stauroneis composition of the two
regions may contribute to the discussion about the cosmopolitan character
and the biogeographical history of micro-organisms.
Two species are described in this book from the Mediterranean Sardinia
island and Central Europe respectively because they might be confused
with the Arctic and/or (sub-)Antarctic taxa.
Table of contents
The genus Stauroneis Ehrenberg 5
Geographical origin of the investigated material 6
Material and Methods 13
Systematic-Taxonomical Part 15
Tables for comparison of Stauroneis taxa
in Arctic and (sub-)Antarctic locations 306